360 downgrading more street

They will be harder to sell, I would try to port the heads maybe go with some gaskets that are thicker like .055 compressed, and then go with a slightly larger cam, I think that one has 248 at .050 maybe something with about 256 at .050 and 108 LSA. I run 11.25 on 93 so you might be ok with 94 and a big cam.