Beggers

I just installed the T56 Tremec in my 58 with the SRIII as well, no cutting except the shifter relocation and removal of the ashtray pocket. Fits with plenty of room. Thread here:https://www.corvetteforum.com/forums/c1-and-c2-corvettes/3460100-58-with-sr-iii-chassis-2.html
Brian

BLOWNZO6

Rick sorry I did not answer you sooner... we ended up going with a kit from Keisler and then fixed it with parts from American Powertrain. We went to a TKO600 instead of the TR6060.

Honestly there wasn't a good way to fix the transmission location of the shifter with a stock Camaro transmission. Also would have had to significantly cut the floor on the car to make it fit.

I actually did a T56 Magnum from American Powertrain in a 64 Vette and it fit very well but still required the floor to be cut and raised.

Currently doing an LS2 and T56 in a 69 Vette and it fit without any floor modification and American Powertrain was able to supply a shifter to keep the shifter in the stock location.