going fast help

I agree with the above posts. Mopodge is dead on right. I really do not expect my Duster to run low 14's as is. (it might....LOL)
The 3.21's hold it back even with the smaller tires. Stock sized. Stock conveter, low comp. 318 with bolt ons and a cam will do nicely in the street.

The quicker you can get out of the hole, the better off you'll be. A good conveter with a set of gears, 3.90's for example and decent suspension and tires to run and hook up in the street will do more than the bol56t ons will for a light to light run. Or the track.

I look at it in this type of fashion;

The 1st to leave the line has the edge. Most races are won and lost at the light.

1st one to 100 mph has a decidedly good edge and now must be run down at the big end. So, first one to 100 mph has an edge.

The longer you can stay in it without popping the engine at red line, the better chance you'll have at the big end. Enter good valve train and stiffer springs.