Mike, isnt the brownie only a .8x ratio for overdrive? Also for the other 5 speeds i assume i would lose my parking brake as mines on the driveshaft but just for fun whst models would be a bolt in swap with a factory v8 bellhousing?.
Yes, most of the Aux Transmissions I've seen have a .8x something OD ratio.
In the early 1960's Chevrolet used the Clark 264VO with OD being 0.80 and by the late 60' they were using the Spicer 6853C with OD being 0.85.
The Aux Trans could be a Spicer 6041 with OD being 0.86, a 7041 with 0.83, a 8341C with 0.84, a 8341F with 0.84 or a 8345F Aluminum Case at 0.84. Note, these are all 4-speed transmissions.
The parking brake should be relocated to the rear of the Aux so if the trans go bumped out of gear the truck wouldn't roll free...
Mike B
