Mild 318 pinging

mine is an ancient Trac-Action dubbed "Dirt-Jerker" It was new in about 1978. I worked at the place that built it for me. It was just a stock 10incher they cut open, replaced the stator, reconfigured the impeller, and put some Torrington thrust bearings into, then lathe-welded it back up..
She has been behind every performance 318 that I have had, ever since, and I suspect has at least a half a million miles on her.
Hang around for a bit, someone will give a recommendation based on experience.