My '68 originally had a 307. I've built up a '72 350 to drop in it. The frame mounts were missing from this sled when I bought it. From my research I've learned that I'm gonna have to do a little engineering to make this work, because the 307 frame and motor mounts will not work with the 350 block.(is this true?) So what I did was talk to a guy at a local speed shop and he hooked me up with some Moroso solid engine/frame mounts which he said would be bolt- ons. I have since checked out some other '68 frames w/o engines but with the frame mounts still intact. I noticed that the frame mounts overhang 2 inches or so forward of the cross-member. My Moroso frame mounts do not in their currently installed position, using 3 of the factory drilled holes in the crossmember. Does this mean that in the current position my motor would be too far back when installed? Am I gonna run into tranny(th350) clearance problems? Should I shut the he11 up and do a million test fittings and leave you guys alone? Thanks!