Finally getting my 516 heads done. New valve springs, new 1.74 exhaust valves and bowl work. As well as cleaned and surfaced.. Next I will be tearing the 383 down to have it honed and decked. I ended up swapping out some heads and cash to get the heads done. I love the horse trading...saved me a ton of cash. Next I gotta come up with a horse trade for the machine work on the block..