318 Build

Car had a 904 /6 and they won't bolt up to a sbm. Radiator was to small to cool a small block with ac. I didn't know that the 727 would work, power robber too
So get a transmission put of a van in the wrecking yard. $180-225 and reuse the trans lines. Radiators are simple, jets or...do like I did and steal one from a 5 series BMW . They exit correct for 70 n up you just have to buy a 30 dollar moroso inline fill neck and use a slant six bottom hose that you finger a dab of coolant inside and force/slip over the water pump inlet.
I paid 40, probably 60 now. Been running it for almost 20 years now with the same damn hoses! I keep my coolant green fwiw. I change fluids religiously with my cars.