Kinda dont know which way to go

I have a 65 273 I just picked up with a fresh bottom end and the heads need redone badly. I have an early iron four barrel single plane manifold for it if I go that route. Or, my friend has a really nice .030 over 318 short block that has trw forged pistons, steel crank, and its all nice and balanced. He also has a freshly done set of J heads with 1.88 valves that he will sell me for 200 bucks with mp valve springs good to a 509 cam, Id use these on the 318. Im trying to get him to trade for my stroker 318 stuff I have around and my 273 stuff, he seems interested.

I just wanted to know what you guys think, go with the 273, have a crap load of work done to the heads and use the iron intake. Or go with the balanced 318 and the J heads. This is going to replace the slant six in my station wagon btw.

Thanks.