Little Help Please

1970 Duster full body, full interior, not sure of weight. Guessing around 3200 with me in it. 360 not sure of compression but does run well on pump gas. J-heads no porting. 2.02 valves. Mopar purple shaft 284/480. 727 tranny 3500 stall. 8-3/4 with 391 gear. 750 holley, edelbrock performer rpm intake. Mt Et Street They radials they measure about 27.5" tall. Hooks real nice. Elevation is 1037 feet at the track. Have been told with this combo, that it is quicker than it should be.

That is pretty quick for that combo - I know cause my fish with a kinda wornout 340 is just a tad slower - mostly in the 60'. My guess is the 3500 converter is where you are making your time. BTW, I shift at 6000-6100 also and still need to hit 3rd before the end of the 1/8 so go phigure. I have about a 8.50 car.