to our forums!! Yes it sounds like you scored on that truck! When you say 3rd gen axle housing you mean it is from a 1985 pickup or 4Runner, yes?
doesn't have the L43 transmission ( Witch came in this model and year correct ? )
Yes this is correct!
I don't know what transmission it is and cant find anywhere to identify it.
The easiest way would be to reply back with some pictures of your transmission. If this is not an option, then please visit this page,
http://www.marlincrawler.com/transmission/rebuilt-complete, and see if you can visually compare and identify your transmission. If you've got it out of the truck, we also have a small table with front input bearing part number identification at the lower right corner of this page,
http://www.marlincrawler.com/tech/transmission/transmission-gear-ratio-chart, which may help as well.
I love your truck already because it has ... Round Headlights!!
BigMike