need help on gears

1981 F 350 4x4 429 spd with 411 gears running at 29 hundred rpm at 60 miles need higher gears any suggestions to what :rolleyes:

I'm running a 351w 30 over with 3:55 gears in my 89 4X4 12 MPG but,
all the power I want. I'm thinking of going to 3:00 ratio myself.

ervinj

cool buddy of mine has 3:00 in ford 1/2 ton loves them u have auto or 5 spd what rpm at 60

Hey guys...here is a good chart to use for determining RPM/Gear Ratio

http://www.4wheelparts.com/Tirel_Gear_Ratio.asp

Hope it helps :)