No. Do I need to?

The AT101s are pretty thin. Have you tried them at 7 psi.?

yes you do.
I've never run those tires. but under pulling theory hard track = hard tire. soft track = soft tire . on a soft track you don't want the point of the tire digging in. you want to spread the tire out more for a larger footprint. hard track you want allot of point , so you raise the pressure to get allot of pressure on the center of the tire

Surprisingly, it doesn't look like the venturi was bored out at all. Will this carburetor be good enough, or do I need to send it somewhere else for more work? I have no idea what was done on the inside other than a basic rebuild.

Use it as is the idle circuit has been reworked as well as some other things. Boring out the venturi might only hurt torque on the big end of the track.

OK, thanks. Did you ever order that governed carb from Lakota?

I have it but have not used it yet as, I have not had time to take it to the dyno for tuning yet.

Do you guys use a PTO dyno? Just wondering because a lot of you guys that have a lot of pulling experience, that I appreciate, talk about dyno runs i was just wondering how you ran those runs. Thank you.

Most have a test stand that the engine bolts to and is hooked up to either the PTO end of the crankshaft or the flywheel. Just depends on the set up.

I appreciate it, thats good information. thank you

we dyno off the PTO end. I think if we ever did it again we would drive off the flywheel end. I think its hard on cranks when you have a heavy flywheel