Combustion chambers are fully polished, and the decks are cut to
equalize chamber volume at 59cc. RHS says they can put these
heads out the door, fully assembled with springs, retainers, valves,
and studs for less than $500*. With the LU5 short-block and a stock
305 head gasket, this combination will yield a true 10.6:1 ratio.

*(1983 prices)