hey i haven't had a chance to make any yet. I just ordered the 6 hole 39$ jobber off ebay to get me through the xmas break, and so far have a mock up engine bolted to T-56 and its in the truck. It appears the tranny is in teh right spot once i figure out yoke situation. I have both f-body and truck a/c brackets, and it's too tight for me. The 6 hole is fine and i'm gunna try to use stock 1991 a/c compressor up top opposite the alternator. So the 6 hole seems to be fine, i dunno how the trans will bolt up to driveshaft yet.
1991 Silverado ECLB
LM7-T56