My 62 SV1 Valiant sedan

My stroker kit showed up today from the US of A......Hughes engines...318/390 kit. The pistons are very nicely finished.....they are "Icon".....forged...never heard of them before.....are they a new mob?
Turns out the balancer is made here.....LOL.
Ive heard they are pretty good. Always good to have your local machinist take a look at them.

What does the crankshaftdamper mean by "use with supercharger or you will break this part?"