[updated:LAST EDITED ON 25-Nov-01 AT 01:28 AM (EST)]There is a HUGE difference between a '71 Stang and a '66. The engine compartments of the '71-73 models were designed accept a 429/460 motor. It is easily done with stock, off-the-shelf parts. The '66, however was only designed for small block fords (ie, 260,300,289) Therefore, they engine bays are relatively small. Sure, with enough money, you can put any motor in any car. Sure I've seen a 351C in a '65/66, but it DOES touch the towers. Imagine a 400 with a 1" taller deck??? Ive seen VW bugs with 502 chevys in the trunk. I've also seen a dual quad 427 in a 75 mustang. It all has to do with $$$$$$. So it can be done. Just its a lot of work.

Stryder