Jim, my 400 was just like that. Stock Pontiac everything except the cam and a dual exhaust. 3:23 gears are my personal gear of choice. I have them in my Bonnewagon. Great accelleration, not bad on the highway. Last February we drove all the way to somewhere past that Kalihari resort place, almost to Binghampton, for a 1977 Trans Am rear. It had only 50k on it and a 3:23 posi rear. The drums were GM factory original and not even worn. It is in the 1980 TA and my buddy is super happy with it. We still don't know what cam is in his 400 but it idles butter smooth and revs briskly. And yours is on a stick? WOWSERS!!!!