340 Piston to valve clearance w/RHS heads

The kb243 .030 hypers I last used weighed 574grams w/o pin, w/pin weighed 693 and cost $27 each, or around $240
You can lighten the pins easily and get them lighter.
I tune cruise to surge then back 2 jets and pinged'em to find max total, they'll handle a pinging.

The trw .030 stock replace forged pistons weigh over 700 grams, I have 2 sets.

I would only use trw's in stock class or where rule mandated, they are titanic in weight.