planing another 8N rebuild

I want to do another N ground up build. Hopefully I wont have to get into the trans or rear end! that would make it a refurbished tractor.
I think the tractor will be a 1952,IF the deal dont fall thrue.
First question, who has the best deal for a v8 conversion kit? If this thought cost to much I will rebuild the 4 banger.
I have access to a 1940 V8,trans,radiator, front axle and rearend out of a 1940 Ford Coupe. These parts can be bought for two grand. the engine has 10 mile on a rebuild.
any thoughts?