the big block fits kinda

[Don65Stang]

WOW....Hello fuel economy!

It's a simple fix - just swap the "m" and "g" in the mpg equation and it'll all be fine.

 

[73mach1]

I used the factory 71 429 mounts on mine also and had no clearance issues at all. I even used hooker headers and didn't have to ding my pipes for clearance of anything,and I have a 4-speed.The plugs are'nt that big of a deal. I have a 76 bronco with a 351w and its worse on the drivers side than any plug on my mustang.