OK, I'm a little cranky this morning, sorry.
If the rear distributor is a problem, I can have the engine built with the front distributor option.
Does this solve any other problems? Can locating the block without concern for the distributor make any improvement on other clearances?
Because of the 700R4, the rear engine cross member and mounts will not used. Tripod mount - 2 front mounts and transmission tail mount. The rear cross member I made for the transmission is bolted to the frame so it can move forward or rear easily. I wouldn't have had to modify the firewall/floor to fit the transmission in if I could have moved the original engine a little forward.
The small block is shorter than the original engine so there should be lots of room to move the engine forward to clear the distributor unless the pan hits the front cross member. (modify the oil pan)
As I recall the cooling fan on the 283has a long spacer between it and the pulley to get it closer to the radiator, that can go if necessary.

Last edited by Jim Sears; 10/08/2017 4:50 PM.