Hey that looks good!!! My motor is turned the other way around. Lol it's called bassackwards cause of that.
Trust me you will have no problem getting the kohlers. Just add more weight out front than usual cause the motor is very light!!! My motor in the stock class with no aftermarket parts I can spin it 6000 RPMs any day. With that many RPMs it makes a nice power band and it makes more torque! I need to put bigger gears in mine. What gears are you Running? Assuming 13,19,26. I run 14,18,20 and really need 15,16,17,19 gear. My mods are very simple and cheap. Let me know if you need any info about my motor. I'm sure you will be fine!
I would never go back to 12 stock altered class no more with this tractor. Only going to run against the flatheads in the 12 stock and 14 stock class and no problem with keeping up with them! Gears are my main issue, with new gears I would be a very good tractor! I'm working on a new motor hopefully I't will be another stock class tractor.
Good luck! You will really enjoy it!!! Of course it's a OHV buddy! Lol