Here is a shot of a 500 caddy in a 51 GMC which is the same as your Chevy. Been in it for over 30 years and 200,000+ miles(rebuilt twice). Go to page 2 and scroll down to blue truck. http://s32.photobucket.com/albums/d41/coilover/
To ZB3--don't have to move box if you use a 55 or 56 265 exhaust manifold.


Evan