08-15-2014, 12:01 PM
They came with 5:29 gear ratio, works perfect with the double overdrive 6 spd with .65 :1 6th gear. The original trans were 1:1, the ol 555 engines were screamers
Love old school

1976 Newell 8.3 cummins allison 6spd
1977 Newell 8.3 cummins allison 6spd