so now the Klune is gone??
would've been really hard to answer with the Klune, just because it could have had several inputs in it... but might be easier than finding something to fit between 4.3 and 300... it just depends on what the Klune input is.
Here's some info from
www.novak-adapt.com :
"Instead of having a transmission mainshaft-mounted input gear like previous Dana's, the 300's input gear rides on its own, bearing mounted input shaft. This shaft (in factory dress) always has 23 female splines.
The front input flange for Jeep versions is round and uses six 3/8" mounting bolts through to the transmission flange. The front and rear output yoke is a 1310. The output shafts are 26 splines for both front and rear outputs.
The Jeep 300 is found behind these factory transmissions:
SR4, 1980-1981 CJ
T4, 1982-1986 CJ
T5, 1982-1986 CJ
T176, 1980-1986 CJ
TF999, 1985-1986
Adaptation to better transmissions is often less costly than rebuilding the weaker Jeep gearboxes and provides serious performance and strength upgrades. "
I know that the later AW4 auto has a 23 spline output, and should bolt up (see the Pete and Sean Show.)
I don't know that any of these will readily bolt to the 4.3.
Now, all that aside... If you're opposed to upgrading the output shapts in the 300, and getting $$$ adapters for it... I think that you might be better off selling the 300 and sticking with an all Chevy 4.3/SM465/NP205 or 4.3/TH400/NP205.
That's just my opinion.