Fan clutch choice

I understand this is more a crap shoot than not. Might as well start with some educated guesses from folks more familiar with the item than I am.

I am looking to change my decades old flex fan, need to choose a clutch. Temp-controlled is a given to me, but...the regular, heavy-duty, extreme duty types? I don't know.

My 340 is a rather mild build: 10:1 iron heads, 286/290º cam, A833, 4.56 geared. Headers are ceramic coated, done to reduce heat...but it certainly gets hot under the hood. Radiator is a 3-core vertical copper/brass...OEM stuff. OEM shroud will be used.

IF a regular duty clutch (say 60-70% engagement) has a decent chance of working, I will give it a try, just to avoid the huge racket a 'stronger' clutch makes.

Maybe a 'heavy duty' (say 70-90% engagement) is the first reasonable choice and a standard duty is a waste of time?

Going to use a five-blade 4140063 fan. I'm sure there are opines on that, but that's not the question.

Thanks!