Yes.I've been 7200, and above 7500 on mis-shift with Speed Pro piston on a stock rod with "Direct Connection" rod bolts.

Spun bearings is likely due to lack of oil. A 383 bottom end will hold together much longer than a 440.

My friend had a 383 in a station wagon that he was going to junk. He wanted to blow up the motor for fun. Put a brick on the gas pedal. We got tired of listening to it after 5 minutes poping and banging because the the ignition and valve train were way past their limit. Motor was fine.