Trying to find motor mounts to put the 472/500 into my 79 trans am. also the tranny mount. I know there out there and have been done but can't seem to find any info on them. Any info on this swap wouldb e great. Thanks

 

As far as I know, you'll be fabricating what you need.

 

Assuming you're using the TH400 that GM bolted to that engine, get the mounts and clamshells for a '74-later 500, bolt them to the engine, get a '70.5-'74 F-body trans crossmember for the TH400, lower the engine and trans in together as an assembly, mounting the trans should be a direct bolt in, then the engine mounts should rest on the subframe.
Then if you're lucky at least one hole will match up on each side. If not, you'll be spot-welding the mounts in place long enough to remove the engine, drill new holes, and bolt the mounts in. But before you get that far, try closing the hood to be sure it clears, and if you need to tack weld, you'll need to remove the exhaust manifolds.

 

Or you could just throw out the boat anchor and install a BBC. Caddy engines have very little performance potential without changing just about everything. Intake manifold is too low. Valve train won't survive much over 4000 rpm.

If you want performance caddy parts, you need to go here
http://www.cad500parts.com/