Chasis dyno would be the way to go. That way you will know exactly where your peak power is and then you can determine your shift points. It might also point out any deficencies you may have in your setup.
Maybe not. The problem is that most dynos are set up for Chevy motors and the testing software starts at too high an RPM to provide peak torque of a Pontiac. The printouts on my engine started at 3500 rpm and I was already past the peak.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI