Picking gears

273 said
Just got a 68 Valiant not too long ago
360/380hp create engine, 2800 stall 727 with 2.96 gears. I want to take it down the strip a few time with the 2.96 gears but looking to upgrade somewhere between 3.55 - 4.10 haven't narrowed it down yet.

From what I understand you should be 500 - 600 rpm over peak power at the finish line which would be about 6000 rpm with 4.56 gears.

My question I assume that performance gain with gears is gonna be non linear.
Like going from 2.96 to 3.73 is gonna be a bigger jump than 3.73 to 4.56 in performance??

Assuming 4.56 is peak performer in this e.g.
Plus what et and mph should I be able to run with the right gear ?

To add to the other comments, if we "assume" you have 350fwhp and a race weight of say 3100lbs, with a chassis that can hook reasonably well, with 28" tall tyres / 4.10 gears, a good run would look something like this>
60 Foot E.T. : 1.68
1/8 Mile E.T. : 7.60
1/8 Mile Trap Speed : 89.39
1/4 Mile E.T. : 12.05
1/4 Mile Trap Speed : 111
1/4 Mile Trap RPM : 5,475.....w/4.56's 6049
But with that 2800 verter you may not 60ft in the 1.6's, your mph should still be there but your ET may suffer some, according to some dyno testing max hp was at around 5300rpm with a 750 Holley and hdrs.