360 Cylinder Pressures

did you do a wet cylinder compression test also.

After you do a cylinder "dry" then put a 2-3 squirts of oil in the cylinder and retest it to see if the results get any better. If a low cylinder increases when wet, then it is in the rings, if a low cylinder doesn't get any better, it's probably in the valves leaking.

Start with a wet AND dry compression test and go from there...