Just checked the indexes for Stock, SS, & GT classes. The SS/GT indexes are almost exactly 1 sec quicker than the Stock indexes for the same lbs/hp classes.
For example: The E/SA class is 10lb/hp & the index is 11.70. In reg SS, the 10lb/hp index is 10.70--one sec quicker. In GT, the index is 10.65.
Several of the Pontiac Stockers can run more than a sec under their Stock index. So, those cars could run under their SS index, without changing a thing.
And, since SS & GT cars are allowed some porting, roller cams, light pistons, alum intakes, tranny brakes, & big tires, running a sec under their Stock index should be easily possible. At least that's how it appears to me.
I'd like to hear what others think. Aprox how much improvement in ET would all those changes make, to a car that will run just under it's Stock index ?
For example:
(1) How much can be gained by the tranny brake & big enuff tires to hook it up ?
(2) Assuming a tranny brake/big tires, how much can be gained by just switching from a Stocker cam, to the correct solid roller ?
(3) How much ET is a Victor intake worth, on such an engine ?
(4) What about the lighter pistons & legal porting ?
Here's another question.
If you choose a '68 428 engine for GT, which is quite popular, the Edelbrock 60587 alum heads are legal. Anybody know aprox how much ET they are worth, over SS legal iron D-port heads ?
http://www.edelbrock.com/media/news/.../070908-2.html
https://www.summitracing.com/parts/edl-60587
http://www.classracerinfo.com/Engine...9&MAKE=Pontiac