I just picked up a set of heads from POKAGEEK here on stangnet. they look almost new, and he only wanted 50 bucks ( thanks POKAGEEK ). Any how he had the valve springs shimmed to work with the B-cam that was running. I want to know if it will be ok leave the heads as is, as I am running the stock cam. I want to put these heads on next week if I have a chance but dont want to run into any unforseen problems.