Lowest geared transmission to fit chevy

[shane_k1500]

What is the lowest geared transmission one could find in a scrap yard to fit a 4.3l chevy flange. (1989)

[GreaseDog]

SM465 or SM420

[shane_k1500]

let me rephrase, *(lowest geared manual transmission)*

[GreaseDog]

SM465 or SM420. did you think i was lying to you?

[shane_k1500]

thanks greasedog, appreciate the help.
cheers

[dave89iroc]

yeah, the granny gear of the SM465 is a real stump puller

[GreaseDog]

SM465 = 6.55:1 1st gear
SM420 = 7.06:1 1st gear

[Underpowered]

what did the sm420 come in?

i currently have the 465 for my Heep

[GreaseDog]

GM trucks from 47-67

[Underpowered]

ok, so it was the pre cursor to the 465.

[shane_k1500]

holer jumpins the sm420 is geared lower then the t-18(bull low)