340 Piston to valve clearance w/RHS heads

I swear they've made those kits for a long time....maybe not for 340's, but I remember looking at them for my original 318 like 5 years ago.

I've got the 3.23's and fairly short tires and 70mph=3000rpm...not quiet (side exit exhaust), and I like A/C so I tend not to take it on road trips (and the current 360 barely pulls 10psi per 1000rpm)