The 600 series Fullers aren't much larger than a Clark 5 Speed. I remember some Chev gas burners being offered with a Fuller, But finding one of those will be tough. Keep in mind that you will need air to shift the range selector and also for the splitter if you go with a 13 speed. If you know a good machinist, he can probably cut the clutch gear to fit a disc that will fit in your Chev clutch housing and build an adapter to fit the Chev clutch housing and the Fuller. I have seen these type of adapters made. Cut the hole the size of the bearing retainer. Dial in the hole and then use dowels to keep it in place. Of course, I too question the reason for this conversion.
