Depends, how late of a 318 LA? I know it’ll work on at least a 74 LA 318 but beyond that, I’m not sure. I know my old 76 truck had a two barrel but it was much bigger and a Holley .
As for the trans, not much super desirable about it. Is it floor shifted or column shifted? It most likely still has the early input shaft style so your market will be limited to those wanting an early style. 65-66 were pretty much it for that style trans. 64 and old were ball and trunion, 65 went cable shifted and kept the trunion, 66 bucks went slip yoke and some started using the rods at that point, others were still cables