GT/KA ? What class?

[Adger Smith]

No. The 327 275 carries more HP(299). That is based on the 1966 327 300 HP(285), via the GT calculator.
I have personal experience with a couple of GT cars & the runs missed the GT Calculator a little. One I had on my dyno, the other went into the car with out a dyno session.

The list below is from the 70 Chevelle as it fit on the GT calculator in GT/JA
Mike,
I'm not sure about your dreamers HP figure comment. If you figure .060 overbore & + .013 stroke on the 327 it comes up 338 Cu In.
If you divide the Required index HP(478.3) by 338 you get 1.412 HP per cu in.
If you take the 1.2 under required HP (663.6) divided by the 338 cu in you get 1.96 Hp per cu in.
Just how far out of line do you think those numbers are. On the one I did my Dyno numbers only missed the 1 second under by a little. I know my dyno well enough to know it is calibrated on the conservative side. I feel it is best that way to work with simulation programs, torque converter companies & customers.

GT/JA
11.60 index
10.80
10.60
10.40 1.2 under

3732.50 min weight



478.3 HP to run the index
592.6 to run .8 under
626.8 to run 1. under
663.6 to run 1.2 under