Stock valves are fine in most any application imo.

stock ITRs will range from 215-250psi depending on the motor and the tester used.

retest it yourself (compression tester is cheap, like 20-25 bucks) and make sure that the engine is up to operating temp and hold the throttle down when cranking it over. disconnect the FI fuse so the injectors don't spray fuel into the cylinders.

if you need detailed instructions let me know and I'll type em up.