I'd like to add just a couple of things:

1) have the machine ship deck the cylinder block so that the pistons are at zero-deck @ TDC. This shouldn't cost more than $75-$100 and will minimize the possibility of detonation.
2) If you want D3VE heads, we've got 'em from [as-cast castings] all the way to [fully ported and outfitted with stainless valves], etc.

Call or PM if interested,

Paul
www.highflowdynamics.com