[czarsmith]

"... Also, because he didn't want to take the interior apart to pull the tranny, I think mainly pulling the tunnel off, he had the tranny crossmember cut out so the tranny can be pulled from the bottom, and now the cross member is a bolt in. ..."

Cutting out the transmission crossmember and replacing it with a bolt in crossmember severly compromises the torsional strength of the frame. This modification is specifically NOT recommended by Superformance. The bolt in member cannot provide the same rigidity as the welded in original crossmember. If you want your frame to twist and flex this is a good way to accomplish that.