Interest in Performance Parts for slants?

I dont under stand?? Ordering pistons or head gaskets is like ordering pizza.... just pick up the phone. I never had problems finding a cam either. Headers.. check.. 4 bbl manifold..check..roller rockers..WOW we can get them too. Webbers, true roller chains, aluminum valve covers.
Please explain.

WIll

Show me a piston with a better compression than stock. I wanna see it. ...and I'm not talkin about the KB239 or KB268. That's not for a slant application.

Show me a THIN head gasket for a slant that's READILY AVAILABLE to buy in quantities.

Show me OFF THE SHELF grinds I can order right now and have in a week.