Ok, you remember how to overclock your 8350? It's the same principle as overclocking, except you're leaving your clock rates the same. You'll take your voltage off auto and put it on manual. Before you do that, you need to get an idea of what's the top voltage it's sucking up while on auto voltage.
I use coretemp to monitor my cpu(it monitors temps, usuage, and voltage). Once you know what the cpu is using on auto voltage, then when you put it in manual mode, you'll start your voltage at that high point(say 1.25V as a for instance). At that point, you'll start doing the Prime95 runs to test. Keep lowering the voltage after each successful test until the system crashes. Then add back a little voltage and retest for stability. If during normal usage after that, the system BSODs or crashes unexplainedly, then add a touch more voltage. Same basic principles.
Now, your temps are of no concern, so, if you're comfy with it, you could certainly do some overclocking, so long as your voltages numbers are in the safe zone for coffee lake(I don't know what max safe long term voltage for coffee lake, I know for Haswell it's 1.3 volts). Hope that new system kicks all the butt you need. It sounds like a nice one.
P.S. I use XTU for overclocking in Windows. I seem to recall that XTU now makes the changes while Windows is active, rather than waiting for the next reboot. It should speed up the process of Undervolting or overclocking. And, as a bonus, it will change your bios settings to the match the changes you make. Using your save bios function, you can keep saving and overwriting in your bios after each successful Prime95 run.