I am building my 460 just for street and a little fun. i have a set of d3ve heads and i know the CC are around 92. i was wanting to raise the C/R a little. how much can i deck my block? that doesnt mess up my intake to my heads right?

 

I Know that it wont really help the C/R with you milling my heads. so how far can i also go on my heads with out messing up the intake to head surface. 0.010? 0.020?

 

460's had different decks to start with. So just removing material is not the ideal way to go. A machine shop will determine how much the deck has to be milled to achive "square". Then you can go from there.
Measure your combustion chambers on your heads and determine how much if any material has been removed. Check the valbe seats to see if any of the valves were ground too far or if the seats are shot pr have also been bround too far.
There are far more ways to achieve compression than just milling the block by a given amount.
Pistons , such as the size and valve reliefs can have an affect on compression. Valve reliefs alone are huge when it comes to static conpression, as well as different thickness head gaskets and combution chamber design.
Machine the engine only as far is required for your application and then change the tunable or variable items to suit you. (head gaskets)
Everything has a pro and con. Cutting the block a long way may not be the way to go for you. Consult your machinist and consider some of the options.

 

Why not just get flat top pistons for it ?

 

I would like to go with flat tops. i just dont know how much lift i can go with before i hit the piston.

 

There is alot of room in there for valve clearence. How big a cam you gonna use?