This winter I am thinking about setting up different rear axle gears for my '67 383 Barracuda w/ a 727 & 4.10 SG. I am not sure how taller gears vs shorter slicks at the track would perform.

Here's how it's set-up
68 383 B motor w/10:1 compression
Edelbrock E-Street heads
Cam - Comp XE274H
230/236 @ 0.50 duration
LS of 110*
Intake CL 106*
.510 lift @ intake valve
.523 lift @ exhaust valve
Holley 850DP
Edelbrock performer RPM
Stock style converter (1800 rpm)
8.00/8.50-14 (27.5") M&H Racemasters
Weighs 3,090#

My best with this set-up is
R/T - .059
60' - 1.969
330' - 5.442
1/8 - 8.303
MPH - 85.52
1000' - 10.787
1/4 - 12.883 @ 107.81 mph

So with all that said, I have been told I could go faster with a 3.73 gear. I always thought the 4.10 would get it going quicker out of the hole. I always thought you set it up to go redline @ the end of the 1/4.

As it is, I'm @ 5,500rpm at the stripe.

I have thought about maybe a 3.55 or 3.73 & a 26.0" slick. Then I could run 28.0 tires still on the street & reduce highway RPM. That change on the track with a 26" tire (3.55/3.73) puts me at 5100/5350rpm at the stripe.

I am considering a better converter, maybe a Dynamic Converter, to get it off the line & get my 60' down. I just want it to be a fairly tight because it's my daily driver.