LA318 Edelbrock Magnum v RHS LAX Heads

Hey..
Not thread stealing because I feel this is relevant to some extent at least.

I am also bolting together a Mild LA 318 at present along similar lines i guess.
I am going with the LA style Edelbrock 60779 Alloy head but have stepped up to KB167 Hyper pistons and zero decked my block (which was barely a 0.010" cut).
These heads measure at 64cc (advertised as 63cc).

Even with this flat top piston change I will be lucky to get 9.5 Comp ratio because of the larger head chambers. With the alloy heads I really should be trying to achieve a minimum of 10-10.5 Comp ratio. Therefore I am now considering machining my heads to achieve say 10.1 Comp.

How much can you safely machine these alloy heads...? I am yet to find out.
I believe I would need to remove around 0.035" of material to achieve that 10.1 Comp.
Currently this cut is estimated only.

So... If you wish to stay with the stock style pistons (assumed?), you will definately struggle to gain a decent comp ratio unless you run the smaller head chamber size.
I'm not sure that taking 0.030" to 0.040" from an alloy head is the best way to go...though I am in currently contemplating this myself right now.

How much can you safely machined a set of heads.. Alloy heads?
Sorry, as yet I don't know. :evil3:

Cheers,
Teedog