I did this combo back in the 70's, then the gas got bad, Rattled like a kids toy. i had that same spark knock pitting, cut the tops off and lived happily ever after. I have those pistons today and i will get you some pics, can see the little pitting marks in the valve pockets. I also have another set Not Cut that i plan on using because now i can get the good gas......(post #18ish)
....BTW the TRW L2322F 030 piston and wrist pin weighs 824 grams (before cut).
Go get 2 gallons at whatever the cost and smile. Then you can take you time to decide which way to go. Your engine is fine
