3.73 + 3.06 + 305ci

With 31's on it I'd drop 4.10's in there. The 700R4 has a low enough OD + lockup to keep the cruising RPM's reasonable, and the 4.10's will give you enough snort in 1st to get the damn thing going with that anemic 305.

Doc

I agree...Go with 4.10 gears! With the 30% OD you will have a final ratio about 2.90.

an '86 305 was what.... 135HP?

-Bret

I believe that is the number Bret! The carbed 305's were pathetic little creatures.

Doc

Thanks folks... I had decided on the 3.42 some time ago, but that now seems a waste of money and time considering the out-come limitations. A

OUCH. $2900 for the ring/pinion and install or $2900 for the truck? If you're paying that for the R&P, you're getting hosed, BIG TIME.

Doc

OUCH. $2900 for the ring/pinion and install or $2900 for the truck? If you're paying that for the R&P, you're getting hosed, BIG TIME. Doc ~~~~~~~~~~~~~

Yes, 2900.00 for the truck. A bit much, but it's in good shape... the interior, body, and a one owner. Nothing monkeyed with, which is worth almost as much--nothing to 'un-do' or 're-do', and I'm sure everyone knows what I mean, especially with older vehicles. I got lucky in that regard. I figure about $250.00 for parts, and maybe put it in myself. What is the hardest part, or specialty tools needed?

Unless you are a fairly accomplished mechanic, NOT a shade tree or hobby mechanic, DONT even attempt it. Back lash, clearences, crush sleave and/or shims... Not for even most moderate mechanics. Could destroy a whole rearend, a week, and a bank account!

I'm running 30.5" tires with 4.10's and a 4L65E tranny (same first gear as the

I love the 4.10's.

I'd at least go with the 3.73's.

-marc