My engine is a 493 cu, indy sr max wedge ports flow 331 int, 650 solid tappet cam, 1.6 harlon sharps, 1090 king demon, alum rods, ross 13-1 comp, run 114 torko fuel, indy dominator intake, callies 4.150 crank, crank trigger, etc.
It dynoed at 771 hp.

I may try the bigger valves but I really don't want to pull the motor apart since it is still fairly new yet. I have 219 181 valves in it now.
I don't think I would gain that much by doing the bigger valves.
Anyone have any real experience doing the valve swap??

Again Thanks for all the suggestions so far.
David