best cylinder head

If you want to buy a head with closed chambers you can use that piston. But you have to be very careful. You see how far the FLAT OF THE PISTON is out of the FINISHED DECK. It is probably less than .030. Then, putting the piston in a piston vice and doing the appropriate dialing in, mill off the FLAT OF THE PISTON whatever it is out of the hole.

Keep in mind, the dome will still be as far in the chamber as it would have been BEFORE you cut the deck. You can end up with more compression than you want. You can always mill a bit off the dome hole your at it.

If you buy a head with the emissions style chamber in it, you can't use the pistons at all.

Look around for some W-2 heads. Decently prepped W-2 heads will whip most other heads out there, even a W-5 that isn't fixed.

What bore size are the Pistons and what is the compression height?