Mike B, Yes I had it installed in a 74 1 ton truck that was set up for pulling a triaxle trailer. It allowed me to split shift each tranny gear giving me an 8 speed truck with overdrive. I might not have been clear on the speedometer. The overdrive unit is ahead of the tranny so the speedo hookup is still on the tranny giving correct readings. Some overdrive units are after the tranny so the speedo is only accurate in low range. The tranny crossmember does need to be slid back 7" and driveshaft shortened 7". DaveV
