You the man Dan!  Good to have friends in high places. 

Thats great news, I really didn't want to part with my complete wiper "kit", and it would be a shame to break it up just for two parts.

Dinnis ,I have 2................Will Call .  

Fatcab GMCs used that type of wiper transmission also .   I'll look if I still have them.............if I didn't give them to Bill Alexander .

I got mine apart. Its a Trico  86 446-4  with this stamped on the steel arms   319 Left   and    320 Right.. I'll see what Rome says and then start looking. My FL/Westernstar dealer is not the greatest on looking up old stuff. But I will pursue that avenue if I cant come up with any other alternatives. Thanks for your help

Denny,
 The one's I have are in a complete wiper kit, with motor, arms and controls. It was sold to me as a kit for a Marmon (which I have) but I'm not sure. I am holding on to it in case I need it, but if all other leads don't get you anywhere, I'll think about selling the whole kit, I wouldn't break it up. Sorry I can't be more  helpful. The only difference I can see on mine from yours, is the washer. Yours is set up for wet arms and mine has two nozzles that spray direct to the windshield.  

Maybe try Western Star. They used that style cab into the early 2000s. 

mark h

All ready talked to them. Have to pull it off this weekend to see if there are any numbers inside.

Might be worth calling Rome Truck parts  
.www.rometruckparts.com/

I've got the exact one I think, It has Trico and 86446-1 cast into the underside. No other number on it. It has a double D shaped shaft with a tapered driver and nut on the end of the shaft. I don't think I would want to part with it, but it doesn't look like there is a bushing in it. In fact it doesn't look like there is a way to take it apart.