Trying to get my newly acquired '60 IH running and after doing some cleaning, timing, and pushrod adjusting I check my Mikuni jet sizing and it's not even close to Piniongears suggested setup. The only thing I had right was the 2.0 Air jet. So I am in the process of ordering said jets and I also notice I have a 1.5 cutout throttle body. My hope is that this will work but I wanted to know if I need to order another slide body and where I should get it, the website I got the jets from doesn't have the 2.5 that Pinion suggests. So... do I need to find one?

Motor specs as far as I know: 900 bored .50 over
Parts I am ordering:
Main Jet= #330
Pilot Jet= #30
Needle Jet= #166 Q-2
Jet Needle= #6DP1
Air Jet= #2.0(already have it)