I agree 100% with what MaddMartigan said and I'll add this: IMHO, It is VERY hard to have a reliable car that is extremely fast. I’ve been down that road a couple of times and in every case, the hunt for more power bit into the drivability and reliability of the car.
Again, just my opinion, but the “problem” with the 1994+ MN12 (4.6L) platform is that to get any decent power and reliability it is just so, so expensive. Don’t get me wrong, I love the 4.6L (and applaud those that have nice setups), but when you compare it to it’s OHV brethren (5.0L), it is just not cost effective.
This is just my suggestion: Get the Mercedes (or Mark VIII)
, sell the 95 T’Bird, and get either an early (67 – 73 so it can handle a big block) Mustang or Cougar and play with that. You will get a lot more satisfaction and compliments on the early car than you ever will with the MN12, which sadly just doesn’t get any respect.
And an early Mustang/Cougar will have resell value, even if it has been modified... as long as you don't go too wild!
But that’s just my opinion and suggestion.
97 Lincoln Mark VIII LSC (Chip'd, 3.73 T/L... so far... )
97 Ford Aspire (Slow, but getting 36 mpg (f'n Ethenol!!
84 F250 Dually w/6.9L Diesel (7.3L IDI pending)
73 Mercury Cougar Convertible w/351C 4V (Partially Restored)
69 F100 LWB w/460 Engine
76 Glastron Carlson 23' Jet Boat w/460 CJ Engine