Rebuilt 318 Magnum. Is it a good deal?

It may be a bit high, but it very similarly follows ‘hot rods 400 horse 318’ build, but roller rather than flat tappet. Some pocket porting/ cleaning on the EQs and i feel it’ll be plenty stout. Besides, if i ever decide to go 5.9 Mag in the future i’ll have the perfect heads for it.

Sure, with some work on the heads, you may get there. You left that info out.