76chevyc20454
Full Access Member
- Joined
- Apr 16, 2015
- Posts
- 74
- Reaction score
- 2
- Location
- Indiana
- First Name
- Justin
- Truck Year
- 1976
- Truck Model
- c20
- Engine Size
- 454
Hey guys, I got told my truck has 3.73 but looking forward into it it does right about 2 grand at 55. ive only had it up to 70 once and it looked like it was at a lil over 2500. I tried a couple rpm calculators and it seams 3.08 add up to the rpm at that speed with my tire height if i got that right. its a 76 454 th400. is the final gear ratio on the th400 1.1 or is that wrong?