[packman33]

I am having a similar issue but let me mention where I am at. I took out what I believe to be the original 350 4-bolt main block with 350 auto trans in my 70 C20. I had a newer (mid 70's) 350 4-bolt built to my specs and I also chose to have a rebuilt 700R4 tranny installed. The motor mounts that were used previously are not currently lining up with the further rear holes in the cross member mount, which after researching are supposed to be used with all V8 motors? I'm seeing conflicting pictures of this as when I look for new sbc motor mounts they are using the cross member holes closer to the front of the truck. So which holes am I supposed to use? If I use the ones closer to the front of the truck then the motor visually looks to be too far front, the radiator hoses crimp and don't fit right, along with none of the holes on the trans cross member lining up. When I push the motor back, motor visually looks better (distributor closer to firewall), radiator hoses fit nice, however the motor mount holes do not line up. Do I have the wrong motor mounts for my mid 70's block to mount to my 70 c20 cross member or is there something else I am doing wrong? I will mention that the mounts I took out appear to be original (mirror type) with the two holes that bolt to the frame, one center bolt to the rubber mount, then one bolt that goes to the cross member. I believe the mounts were originally bolted to the front holes of the cross member, which again conflict with some research I have done and the rear holes of the cross member will not bolt to the mounts I currently have.

Thanks for any help you can provide.