1972 340 for aluminum heads wi

Im in Ellsworth wi I have a 1972 340 block, heads crank and timing cover and factory 340 harmonic balancer, I'd like to trade towards a set of SBM aluminum heads (no need to be top notch will take speedmaster) that are bolt on ready that can hold A 500 lift cam shaft.

Block will need boring i am sure and crank has very light surface rust on journals but very buildable. Another baby on the way so im back to horse trading to keep making progress.