Everyone. Just a FYI. My dad and me have done a LS2/4L60E swap into a 65 Coupe. Engine and drivetrain is from a 2005 C6. Everything has been working fine. Only mods to the tune is VATS delete and rear O2 sensors.

However today the car went on the dyno, and it wouldent go above 5300RPM. Turns out there was Speed limiter 2 was set to 80mph or some random number, cutting fuel. Setting it higher solved the problem. That portion of the tune was untouched. I am guessing that's a new table HPtuners populated with 80mph when I did the VATS etc.

Just FYI if somebody else has the same issue.