318 with "special" j heads?

I have a rebuilt stock bottom end 318 with flat top pistons. Pistons sit in in the hole a little and I'm going to measure for exact. My question is: I have a matching set of 360 j heads 1.88/1.6 valves that were milled to 49cc chambers. I ran them on my 360 for awhile but it was too much compression since my 360 was zero deck. Will these heads work well on the 318 since the compression will be less. I'm thinking it will be right around 10.5-1 compression. I also have the milled matching intake for it too. It is a eddie rpm. What do you guys think?