Is there any reason not to use 2.08/1.74 valves vs 2.14/1.81? I am stuck with factory exhaust and 6bbl intake so would bigger valves actually hurt? I need to buy valves and have seats cut on a serdi so cost is not an issue, pistons have reliefs and are .001 in the hole. Heads are 79cc now, .039 head gasket. Intake side gasket matched, pushrod pinch is .080 wider, and will minor blend below the serdi cuts, and widen a little beside the intake guide. I put the heads on the block and scratched the cylinder wall edge on the head, and feel the bigger valve will not do much good on this engine. I also must use a streetable cam, nothing crazy.