using a newer manual bihind an older small block

[elacruze]

My '68 D200 is a 4-speed, but it's a np435 which is a granny-low very wide ratio trans. The bellhousing pilot hole and input shaft length are identical to an a833 OD, but the bolt patterns are different. I'll have to do some creative fabrication, or change over to a Lakewood bellhousing and weld some mount ears on it-truck bells have frame mounts instead of tailshaft mounts.
In any case, you surely don't want a np435.

[charger2fast4u]

anyone know what the final OD gear ratio is on the A-833OD? is the OD trans similar the original 4 speeds that were factory in chargers just redesigned with a better final gear for highway cruising?

[Troy]

anyone know what the final OD gear ratio is on the A-833OD? is the OD trans similar the original 4 speeds that were factory in chargers just redesigned with a better final gear for highway cruising?

It's a .73 final drive. The first link I posted above will answer your other question but, basically, the dimensions are the same on all A833 cases. Tail housings/shifter mounts differ by application. All 4 gear ratios are different on the OD versions (3rd is 1:1) to compensate for the larger spread.

Troy

[68corazonetR/T]

So apparently GM used the same trans.....anyone know if they are interchangeable or will I run into different tails and shafts?