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post #1 of 19 (permalink) Old 10-25-2007, 04:58 PM Thread Starter
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Bad News!

So upon taking my heads off, to replace the headgaskets. I saw that on the passengers side head there were 3 large cracks in the head. Long story short, I don't want to replace the heads, and I really don't want to throw the car out, cause the body is in incredible condition. So my only option is a motor swap.

So what should I swap in?

A. 3.8/4.2
B. 302
C. 351
D. 460
E. another suggestion?
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post #2 of 19 (permalink) Old 10-25-2007, 05:16 PM
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Carbed 351, though a 460 would be sweet as well.

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post #3 of 19 (permalink) Old 10-25-2007, 08:33 PM
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Carbed 351, with a vortech. That'll put some punch in your pants.

Ya, its funny, Funny like a Clown.
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post #4 of 19 (permalink) Old 10-25-2007, 08:35 PM
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I say go for a splitport 3.8. That would be the easiest swap, and would get you a more powerful and more reliable motor without too much work, and without killing your gas mileage.

-91 Cougar LS, coming soon, complete overhaul with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
-"Your buddy Mike is INSANE!" -ClintD's dad
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post #5 of 19 (permalink) Old 10-25-2007, 09:37 PM
 
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I agree with madmikey go with the splitport especially if its a daily driver.
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post #6 of 19 (permalink) Old 10-26-2007, 02:39 PM Thread Starter
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the car was never really a daily driver, and im not really looking into making it one. So I think I will go with a 351.
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post #7 of 19 (permalink) Old 10-26-2007, 03:14 PM
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351!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

sounds like a nice number, at least to me...I don't know why though..

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rest in peace JL
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post #8 of 19 (permalink) Old 10-26-2007, 03:17 PM
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If you are going to step up---take a big step and find a 94-96 351 block(roller cam) and get a stroker kit for it --the 392 is a cheap option since it can use stock 351 rods and stock 302 pistons---all you need is a crankshaft and a balance job a decent set of heads and you are making 400+ HP and near 450 torque for the price of a normal overhaul -------and haul is what you will be doing afterwards...................Dan
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post #9 of 19 (permalink) Old 11-07-2007, 12:23 PM
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Quote:
Originally Posted by Old_coot View Post
If you are going to step up---take a big step and find a 94-96 351 block(roller cam) and get a stroker kit for it --the 392 is a cheap option since it can use stock 351 rods and stock 302 pistons---all you need is a crankshaft and a balance job a decent set of heads and you are making 400+ HP and near 450 torque for the price of a normal overhaul -------and haul is what you will be doing afterwards...................Dan

I've got to stop rading post like this. Just when I think I'm going to build a 347 stroker I see this and the gears start turning more.
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post #10 of 19 (permalink) Old 11-07-2007, 01:25 PM
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I've got to stop rading post like this. Just when I think I'm going to build a 347 stroker I see this and the gears start turning more.
I haven't got all the bugs worked out of mine yet, but I can tell you that a 393 in an MN12 makes for one insanely fun car. If you are going to build a stroker, forget the 347, the 393 is the way to go! There are a few fitment issues to take care of, but I think you could build a 393 for cheaper than a 347.

-91 Cougar LS, coming soon, complete overhaul with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
-"Your buddy Mike is INSANE!" -ClintD's dad
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post #11 of 19 (permalink) Old 11-07-2007, 01:31 PM
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I know you have to notch the front cross member for the oil pan to clear and about the steering shaft issue at the header. Is there anything else?
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post #12 of 19 (permalink) Old 11-07-2007, 01:38 PM
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I know you have to notch the front cross member for the oil pan to clear and about the steering shaft issue at the header. Is there anything else?
sure....what do you intend the car to be? street car, track car, both?
does it need to pass emissions?

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rest in peace JL
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post #13 of 19 (permalink) Old 11-07-2007, 01:39 PM
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If you want to keep fuel injection, you need a raised fiberglass hood and you need to notch the cowl panel some to clear the upper intake. I think that's about it. I ran into a few more snags because I also moved the motor back an inch, but in the stock position, you shouldn't have those problems. It really wasn't bad at all getting it in place. I used the stock 5.0 accessories and brackets, and if no one told you what it was, you would probably think you were looking at a mildly done up 5.0.

-91 Cougar LS, coming soon, complete overhaul with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
-"Your buddy Mike is INSANE!" -ClintD's dad
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post #14 of 19 (permalink) Old 11-07-2007, 01:45 PM
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Nick......................I'm back!!!
May you fly low and fast
rest in peace JL
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post #15 of 19 (permalink) Old 11-07-2007, 02:04 PM
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That just reminded me, quick question for you. With that rad, do you have any problem with your car not getting up to temp? My car has yet to run above 160 cause the rad cools it faster than the motor heats it up. I know you have the electric water pump, so you can control it better, but before you put that on was it too much rad for the setup? It's not really a bad thing, better to be too cold than too hot, but I just figured I would ask.

-91 Cougar LS, coming soon, complete overhaul with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
-"Your buddy Mike is INSANE!" -ClintD's dad
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post #16 of 19 (permalink) Old 11-07-2007, 02:11 PM
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That just reminded me, quick question for you. With that rad, do you have any problem with your car not getting up to temp? My car has yet to run above 160 cause the rad cools it faster than the motor heats it up. I know you have the electric water pump, so you can control it better, but before you put that on was it too much rad for the setup? It's not really a bad thing, better to be too cold than too hot, but I just figured I would ask.
before the electric water pump, it would stay around 190 degrees or so(with a 180 stat)......when racing it balls to the wall, it would get to around 210.

but now, like you said, I can regualte it where ever I want

Nick......................I'm back!!!
May you fly low and fast
rest in peace JL
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post #17 of 19 (permalink) Old 11-07-2007, 02:12 PM
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what size stat are you running?

Nick......................I'm back!!!
May you fly low and fast
rest in peace JL
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post #18 of 19 (permalink) Old 11-07-2007, 03:31 PM
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I've seen this many of times while searching through threads.

Most likely I will go carb. I hate computers on cars. A nice street car is my plan.
I know a new tranny & 8.8 rear are also manditory for a V8 swap.
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post #19 of 19 (permalink) Old 11-07-2007, 05:49 PM
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I've got a 190 t-stat. I just got the car running, and it has been pretty cold here, and I haven't really taken the car out and beat on it yet, so we'll see what happens, especially in the summer. But just sitting there idling or normal driving, it won't get above 160.

-91 Cougar LS, coming soon, complete overhaul with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
-"Your buddy Mike is INSANE!" -ClintD's dad
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