which tranny to go with?

[whitesswj]

I've got a 68 w/o a tranny or mtr i'm building.

I've got a brand new rebuilt 350 bored 60 over long block to set under the hood w/ edlebrock 1405 carb and preformer intake. I've got a 3 spd from a 67 to put in but i'm leaning away from.

I've got a good deal on a 4 spd out of a 72 4x4 (granny low 1st) i'm thinking about.

mind you i want to stay w/ a manual (just more fun), i'm thinking fuel econ here.

is a granny low 4spd better than a 3spd? if so what is the differance in gear ratios in the 4th gear over the 3rd in the 3spd?

You guys know alot more than i as i am 21 and have only had my hands in this like of hobby for just over 2 years - help me out.

sswj out

[kwmech]

3rd gear and 4th gear are the same final ratio of 1 to 1. Sounds like you are building more of a performance truck than a hauler, so I would forget about the granny box and maybe lean towards a heavy duty car 4 or 5 speed. It would also depend on your rear axle ratio and tire size.