4/10 track

[40rracing]

I have a car I'm building for a 4/10 track I have never been In a dirt car before. I have T5 trans with a 2.34 2nd gear my motor is bone stock I just wondering what gear I should run im not trying to win races just get some seat time and have fun

[mustang99]

depends on what size tires your are going to run...13 inch or 14 inch,,if u run 13 inch tires i would go with 308 gears and 14 inch tires ,i would go with 345 gears.that is if u have a 7.5 rear end

[40rracing]

I will be running 13 inch wheels. Haven't got a rear end would there be a difference between a 7.5 with 3.08 and a 8.8 with a 3.08

[mustang99]

no a 308 is the same..but the 8.8 has several more different ratios than the 7.5

[car62]

and the 8.8 is about 40lbs more unsprung weight which you DONT want...if running 3.08 gears try to find the 6 3/4" rearend

[40rracing]

I thinking the 6 3/4 rear end is what I have now. The cover unbolts from the back with 10 bolts and is almost a perfect square shape and it has a 3.08 gear. But the wheel cylinder are bad I tried getting new ones but can't figure out what the rear end is to by them for

[40rracing]

Do you know what kind of cars they came in the one I have looks like its factory. It doesn't look like anybody has welded the ears on for the control arm it all looks stock

[car62]

some of the 1979 mustangs had them...yes its the almost square one