55.2-59 700r4 Trans and stock crossmember

[qbeanie]

This is an old post but i have the same issue. My 57 is an original automatic transmission truck and the bellhousing crossmember is removable. the previous owner of the truck hung the 700R from the original crossmember by lowering the crossmember and utilizing the lower crossmember mounting holes on the frame rails. I was going to fabricate a new crossmemberr that would allow clearance for the 700R torque converter dust cover along with a rear crossmember to support the transmission. My question is could a i simply fabricate boxing plates utilizing the existing bellhousing crossmember flange bolt pattern on the frame to prevent frame flex and potential cab sag and front spring issues?