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thinking about buying a short block with pistons for c heads but i have a460heads. is the valve releif close on these two heads. can i cut this piston to accept a heads. ross flat top
 

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No Can Do

The valve reliefs are in two different places. Also the C-460 head doesn't have valve cant and the piston generally has a shallower relief. The A-460 head has a cant angle and that requires that the A-460 valve relief be deeper over there on the side right above the top ring. This requires the top ring of an A-460 to be placed lower than a C-460 ring with all other factors being equal. A-460 pistons sometimes burn through at this location and even if you cut new valve reliefs, they will likely be too thin above the top ring.

Hope this helps,
 
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