Thanks for the input. My vehicle is a 1956 s120 Travelall, my second one. After getting the first one set up like I wanted it, with the improved mileage and performance of a Chevy 292 six, when my wife said she was being transferred to CA, I gave it away! Stupidity!
Finally found one that was "restored" on Craig's list 4 years ago. Seller was asking top dollar and I didn't have it. After it disappeared from cl I contacted the seller to see if it had sold. He concluded it wasn't going to in that economy and if I wanted it to contact him any time because he probably still have it.
Two years later my wife got a bonus and offered a portion of it to buy the '56. The seller still had it. Same price. Drove to reno to see it and flew back to reno the next weekend to buy it...and drove it home to san jose.
Was unimpressed with the slow speeds and average of 10mpg fuel burn. Differentials are 3.73:1. Not sure that there are higher speed gears for the '56 s120 4x4. Even if there are, indications of what I have seen of similar ihc swaps, the cost is pretty high.
I have been looking for od units that I could stick between the trans and transfer case. There is no such thing as a "cheap" one. I have found the trans you referenced for as little as $200 with warranty. But, I do not know the od ration on that tranny.
There are also some very expensive overdrive new transmissions available, but $2500 for a tranny just isn't going to save me that much gasoline. And, they kept saying that it wouldn't fit the ihc. When I fit the Chevy 6 to the previous s120 I had to hand make all the adapters to mount and connect the Chevy engine to the ihc trans, 'cause it didn't fit! Which including creating my own clutch system. I look back and wonder why I kept no construction notes and pictures, as much of the changes I made would be easier now if I could remember how I did it then (also converted it to saginaw steering...which is really stumping me this time around)
My first vision of it in reno
my "fully restored" prize is not. Lot of small problems such as gas tank(s) that read 1/2 full when they are full and empty when they actually are half full. Vehicle is converted to 12v but he changed things that didn't need to be changed and I'd say he installed the incorrect ohm tank sending units (people don't believe me when I say that nothing had to be done to the sending units or the gauge during a 12v conversion).
It also needs the "knock gear" (final drive gear out of the transfer case in the np201 tc) which I am replacing with the one piece solid gear out of the np200 tc. I welded that gear up in the first Travelall and then drove it 200,000 miles without a peep.
