Need help on PTV clearnce issue- 402 LS2

[Z06vet]

This was a complete pullout from 05 C6. I pulled the motor apart to put all new gaskets and inspect it. #5 piston had a very light mark where ex valve touched piston at one time. No evidence on the valve though. This led me to check ptv. I used the putty method with 2 solid lifters, adj pushrod, & checking springs. The intake valve makes no impression, the exh leaves the putty paper thin, not even measurable. No one local is interested. Few people I have talked to said this cam should not be a problem. AES built LS2 402 short block w/flycut pistons. PRC 243 heads 2.1 intake/1.6 exh. There are no #'s so I cant find exact specs on heads. I used a set of stock 799 heads for comparison with same results. Stock GM head gasket. Comp HUC cam 239/247 621/632 114. Pushrods are 7.4 I have done about 10 cam swaps on LS motors, but this is my first stroker. I don't have a degree wheel, nor have I ever used one. I'm not looking for free advise, and I'd be willing to ship the motor if needed. I know this can get technical, and I'm willing to do the legwork. Scott