They are poo poo dog cams. Unless you have a3k stall, 3.91's 10:1 (or better) good exhaust (headers)RPM intake (or like), good carb they are dog cams. They don't pull until 3k or better, make no power down low. If you have all the above they will work pretty good however they are not a good street cam. They have terible idle quality and pull zero vacuum.
Hmm mine must have been an oddball. Didn't have any of those problems. Idled well ran power brakes with no problem, ran about 2600 stall, stock 906 heads. I ran 3.23 gears for several yrs. Compression 9.5,Intake Holley street dominator. Carbs AVS, AFB , Holleys all worked well. Actually liked the holley 750 dbl pumper best. When I decided to add a little more gear I ran it at the track and had a best of 12.80 at close to 3700lbs.
