So, just for fun, I used good old "Horsepower Calculators":

ET method:
hp = weight / (ET / 5.825)^3

Trap speed method:
hp = weight * (speed / 234)^3

My results were 169.3hp and 169.6hp respectively!

Giving 25% drivetrain losses, we get 212hp "at the crank", so everything seems in the "proper ballpark"!

I just might throw it on the dyno, if I can catch a cheap Dyno Day with one of my car clubs.