Rebuilt 302 casting heads available through Rockauto

I couldn't find any 273 heads close to me and I don't think magnum heads work on an LA engine, do they? Who rebuilds 273 heads for a good price? Rebuilt 302s being available is the big news for those of us looking for a reasonably priced build of a 273 or 318. Getting my 675's rebuilt would have cost more and left me with lower compression. I'll even venture that I might be able to use 87 octane with the 302's.
At least that's my story.