I pulled the air cleaner off tonight and armed with a bit more information, I am one step closer to understanding...and a plan.
The picture below is my carb. This is very clearly a '75 Aisan Federal carb (see
this set of photos from SOR).
First, a seemingly stupid question that forum searching did not answer: Were Aisan carbs the OEM equipment on these trucks? People talk about them as though they were aftermarket, but then no-one ever talks about Toyota/TEQ carbs?
Second, seems to me that this carb is going to just cause me headaches. The truck runs ok as-is, but I really don't like the idea of having mis-matched parts. And when it *stops* running OK and *I'm* the one trying to fix it (being generally clue-less) it would be great if the pictures and descriptions in the repair manual made sense an matched what I actually had.
For now, anyway, I'm just trying to understand what I have. I'm not making any decisions. The air-filter is fairly secure sans-bolts, so it'll hold for a while.
My biggest concern is the vacume tubes. There is nothing connected to the nipple on my distributor.
This thread indicates it should come from the carb somewhere. I can't find any thing obvious there. On top of that there *is* a tube coming out of the air filter assembly that is not attached to anything (I might have pulled it out removing the air filter assembly last night). I assumed 1+1 = 2 and it connected to the distributor, but after reading that thread I'm not so sure.
On top of that, there are 3 (three) tubes that terminate near the emissions "computer" thingy, but are not conected to anything at that end.
The good news is that this is a blast. My hands are greasy and I'm remembering things about working on engines that I forgot 20 years ago.
