I am using the motor mounts out of my j-3000 into the kaiser, the frames are the same width the last time I measured, they should still be the same. Remove motor mount brackets from you're donor truck and when everything is lined up figure where they need to be and weld them in. You should probably replace the rubber engine mount as cheap insurance. Good luck I'll post on how my converision is going, still looking for the proper bellhousing t-98 to buick 350. Good Luck Fisherman