ooops, bam I see that th400 thing Now? Oh well..

Did I miss what axle gears?

I can't stand the t-case "regear" kits because they tend to break or get really noisy. With the exception of the 4-1 kit for 231's, they seem to hold up fine.

D300 case is a passenger side drop. All cj's from 80-86 had them.

Upgrade the intake/exhaust and get TBI on there and you might have the HP you need in high range?
On my 304 I went from a ford 2bbl to Holley (don't recomend)projection and on my chassis dyno went from 120 to 160 hp.
On mine I did not upgrade to a 4bbl intake, I built my own adapter from the OE 2bbl intake directly to the GM/Holley TBI pattern throttle body. Before I did the EFI I had already spun all the timing a old 304 could take into it.

I guess what I'm saying is.. tell me all the before and "want to" upgrades before you do them and I can help.

SD
Josh