so heres the thing the shaft is 3/4" to add on to the hilly thing i dont know what that is and i live in georgia i was looking to get the clutch from a company called GoPowerSports.com but also to add on tire size is 4.10/3.50-6 on the rear and 4.10/3.50-4 in the front
Thanks!
3/4" straight shaft is the small block standard, it's also important that the shaft is at the very least 2¼ in length from the end to the shoulder (the fatter point the bearing and seals ride on) but anything under 3" is great.
I mention this because I have a Briggs Flathead with only 1⅝ which is okay mostly but far less than ideal, and since your engine is pulled from a powerwasher it could come up a bit shorter than most.
Georgia would be a mix, Northern would be hilly mountainous, and mid state/south would be more coastal flat... so it depends on what part of Georgia you're in.
Your answer of "street asphalt" says a fair bit of stop and go contending with roadsides and traffic so regardless of terrain type a Comet 30 copy/clone
IS the only safe way to go.
Saying you're getting a clutch grom Gopowersports is relatively useless information by itself.
Your tire size is really only relevant to the final drive gearing ratio, although with a 30 series TC and such small drive tires you could gear in the range as low as 3.6:1 to upwards of 5:1 and still pull hard with a respectable top speed.
I'd suggest staying around or below 4.5:1 or 5:1 If you're in Central or Southern Georgia, 6:1 for Northern.