I’m doing some j’s right now.
They will def cost more that what you could buy import aluminum heads for, and the owner wants some quench out of a 340, so it’s going to get some expensive custom quench dome pistons too.
The quench area depth varied .040, and after equalizing that and the valve drop, one head still had one big chamber, and one that was 3cc smaller.
They’re within 1cc now....... but that type of **** just eats up time.