I stumbled upon a 360 complete that was already machined some time ago. It has flash rust in the cylinders. And it'll need to be gone though again. But it's all there. Along with a 727.
A quick ball hone with some PB Buster. A bath in water with DAWN dish soap. Blow out all passages and heat the block up with a torch and let it air dry.
I'd maybe have them square deck the block true. Factory spec's were a bit lax.
Just clean the BOOGERS out of the ports of the head.