I have never seen a diaphragm clutch in a stock SBM A-body; those were a Chevy thing.
With street gears, 3.55s or less, your stroker will need a serious clutch to not slip at lower rpms when you get on it.
If you put a "bit of a cam" in a 360, you'll again need a decent clutch as she gets on the pipe, in the middle of Second gear.
A 360 with a bit of compression and a bit of a cam, cranks 430hp out real easy. But more importantly, she could easily put out 425 ftlbs. Check this out;
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https://www.hughesengines.com/TechArticles/2360dynotestfeb2000.php
I built a combo like this with a 223/110 cam, back in year 2000. The cam let go in 2004 and then I installed the HE3037AL, same as in this article, but at 11/1 Scr(Alloy heads). Very potent street combo, with a Commando 4-speed and 3.55s. My car is 3650 with me(220) in it.