The 2.02 valves are not going to make a huge difference in power IMO. Bigger is not always better.
If you install 2.02 valves and do not open the chambers, your cyl head will flow less than what a 1.94" valve would flow.
I am not sure if Tom has tried 2.02" valves & flow tested them?
You just cannot leave the chambers stock, & you do not just install a cutter on a pilot & just notch the side of the chambers & expect for the head to flow well. It does not work that way.
Your valves are probably just S.B.C valves, 11/32 stems. You can get .050" & .100" long.
A.F.A.I.K., .100" long is standard size you would use.
Just relax, Tom should be able to set-up your head & not have any problems. Call him up & tell him your concerns & your questions.
You add shims to get your seat pressures, you don't keep cutting the spring pockets to get your installed height correct.
There are many different retainers you could use that have different located steps in them to achieve your required installed height. 10 degree locks are better & are the ones you should get.
