got a 355 small block with 305 heads on it, 58cc chambers, 1.84 intake 1.4 exhaust, runners are ported nicely and they actually flow pretty good. i have flat top pistons, .038 head gasket, and block has never been decked. how much of a cam can i go with before i start worrying about clearance issues with the pistons and valves? also, how far can i go with stock springs?
:edit: the flat tops have valve reliefs just incase that makes a difference.