LA318 Edelbrock Magnum v RHS LAX Heads

Many Thanks for your thoughts and comments on this, very helpful and very much appreciated.......

Couple of things I wanted to bring up here:

The top end oiling system differences between the magnum & LA head versions:
Is one oiling system version superior to the other? Is it better to stick with the LA btm end and LA top end matching than have the mixed combo of the magnum top end oiling system with the LA btm end??

318 std low compression issues:
Whichever head I end up using, I am leaning towards skimming/machining of cyl heads to bring up the comp ratio, guessing going from approx. stdish 8/1 to a pump gas 9.75/1...
Anyone prepared to guess (approx) how much to mill off cyl heads?? plus, which head/heads would be best suited to this type/amount of machining??

Both of the above issues are going to help me greatly with my cylinder head choices.....