If anyone is interested I was able to use the stock 305 LG4 motor mounts on my 454 Chevy in an 84 TA swap. I also used the stock starter with some 00 battery cables and it cranked over just fine. I used a Vette water pump and the whole thing squeezed in by about an inch using a flex fan. You guys probably already knew all of this though. That was a long time ago.

 

how hard was the header exhaust setup? this seems to be the problem areas.

 

The headers fit, they had an odd 90 degree bend in them and ran outside the subframes on both sides which I had running to 3" flowmasters, the one on the passenger side tucked up where the cat had been. If I had to do it all over again I'd have used shortie style headers which could probably be routed similar to the original setup.

 

so what the motor specs? how she run?