2/17/2020 Update: Today I hooked up my small trailer to take some metal to recycle (around 200 lbs.), I have to admit, to be completely honest, under load I could notice the engine did have quite a bit less power than with my Rochester B. I wont say it was a remarkable amount but still noticeable. It was a small trip I took, perhaps a 3 mile round trip, but on the up hills I did notice having to go deeper into the pedal to power uphill, where I hadn't had to do with with my Rochester in the past. I'll continue testing the UN2 with an open mind. My Rochester can go on it later if I like and I do have a 235 engine I can try it out on to see if its a better fit for it. Still content with its better drivability in town, but will have to try a heavier load next time to see how it performs.