302 or 351 LT Headers - TCCoA Forums
 
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post #1 of 6 (permalink) Old 09-06-2012, 06:51 AM Thread Starter
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302 or 351 LT Headers

What LT headers work in a bird with either a 302 or 351 based engine? 1 5/8 or even 1 3/4 primary tubes.
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post #2 of 6 (permalink) Old 09-06-2012, 10:16 AM
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Thunderbird 5.0 LongTube Headers

Unfortunately...There is no "plug & play" LongTube Headers for a 302 powered MN12..

There are options though..


MaddMartigan has a Sticky on it here: 5.0 MN12 Longtube Headers Installed (DUW)

He used Ceramic Coated Longtube Headers..Like the ones found here: Mac TFA793 Ceramic Coated Longtube Headers

If you're on a budget I would reccomend the non-ceramic coated version found here: Mac TFA9358 Longtube Headers


The M5R2 Manual Transmission is not as wide as the AOD..Which gives you slightly more room to work with..


Regardless of the Transmission you choose..You still have just 2 options installing these Headers:


Option 1: Raise the Engine slightly with 3/8" shims on the Motor Mounts..So the Headers clear the K-Member..

Which includes beating your Floor Pan with TLC..



Option 2: Keep the Engine at the stock height..Which includes cutting and beating your K-Member..


If you're running the stock 5.0 HO MN12 Intake..The 3/8" shims shouldn't effect your stock hood clearance..

But...

If you're running an Aftermarket Intake it's likely you're going to need an Aftermarket Hood..

You don't need the "Steering Shaft Mod" if you stick with these Headers and a 302..



Going with the 351W..You surely will have to do the Steering Shaft Mod..Here's a link: Steering Shaft Mod

The "Steering Shaft Mod" opens the door to many Aftermarket Headers ..


But..


The 351W will almost certainly require an Aftermarket Hood if you stay EFI..











Rayo..

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Last edited by Rayo; 09-06-2012 at 10:59 AM.
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post #3 of 6 (permalink) Old 09-07-2012, 06:51 AM Thread Starter
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Thanks for the quick reply and info!!

Looks like it should be a fun project lol.
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post #4 of 6 (permalink) Old 09-07-2012, 04:51 PM
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Quote:
Originally Posted by GilroyRacing View Post
Thanks for the quick reply and info!!

Looks like it should be a fun project lol.

Np.

Have fun!







Rayo..

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1991 Ford Thunderbird Sport

"If you don't know where you're going..Any road will take you there." George Harrison
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post #5 of 6 (permalink) Old 09-07-2012, 05:52 PM
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opt 2



On opt 2 what if you lower the engine?
Do you still have to mod the lower firewall/floor?


Paul [email protected]
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post #6 of 6 (permalink) Old 09-07-2012, 10:03 PM
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Quote:
Originally Posted by tbirdtess View Post


On opt 2 what if you lower the engine?
Do you still have to mod the lower firewall/floor?



If you "Lower" the Engine...That's going to throw another variable into the situation..

It will allow the Headers to clear the Firewall/FloorPan..

But..

That also means the Headers are going to be sitting on the K-member..Which means the K-member will have to be chopped up and or hammered..


And...And..

By lowering the Engine you change the angle of the Headers..

The steering shaft will not be able to slide in between the "Driver Side" Header Primaries with the Engine lowered..

Which means a Steering Shaft Mod may be in order..


I guess you could call that Option 3..lol





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