mtnhomie89

I am buying an 83 GLX convertible 5 speed, I have always wanted to drop the 427 in the 69 cougar, but after driving this car, I really want to see this baby pass 500 horses, so I was wondering if you guys would know if I would have to do some welding and cutting to make the 427 fit in the 83 mustang 5.0 GLX

Gary H

There used to be swap kits out there for that, but unless you have the 427 why bother? You're going to need alot of upgrades to handle the HP.

http://www.ddautospec.com/products_engineswap.html

MustangMan628

I've seen the big block swap done in my friends stang, but personally don't know every little detail. I know there was professional fabrication on the motor mounts and most of the front end. It was beefed up to handle the extra weight too. And it was a bithc to find a fan that wouldn't hit the radiator. Then he put twin 4 bbl carbs and they hit the hood because the motor wasn't low enough, so he got a cowl because nobody manufactured a shaker for twin 4 bbls when this swap was done years ago. That was one of the fastest NA stangs I have ever been in though. Good luck with the swap

Gary H

BTW, a 427 is a bolt in for the cougar. Factory mounts etc..