i have an 87 xj, 4.0, aw-4, np242...

what are my uber low gearing options, and which is most affordable?

Most affordable is a Crawl box NP231 - NP231 doubler.

IONO if the doubller will work on an NP242 though, But the 231 combo would produce for me, about a 130:1 crawl ratio.

np231-d300 crawl box.

what can i pick this up for?

is the 231 a 2 part t case like the 203, and you can just un bolt the planetary portion of it?

what can one expect to pay for a dana 300?

will the 231 potion mate to my 242 adapter and to mt torque converter or do i need to swap this out too?

I see long D300s going for 100-150 and the short d300s going for 200-300 around these parts.

Yea, the 231 is a two piece.

I see long D300s going for 100-150 and the short d300s going for 200-300 around these parts.

Yea, the 231 is a two piece.

i wanna go to these parts...