Re: 4-spd vs 5-spd
I have an M22 auburn gear trans with 3.73:1 rear, same tires you have.
Sometimes I wish I had overdrive, but, it sure is fun on the street.
My take on the 5 or 6 speeds is, shift, shift, shift, shift, shiftshiftshiftshsaeie[jaf'l;k AHHHH!
With a bunch of torque you don't need a bunch of gears.
If you want better gas mileage and cruise speeds, get a 6 cyll Nova. just sayin
1969 Chevelle 460, 3.73 posi
Auto Gear Super Case with M22 gears
12.11 @108 mph
Top speed 114.23