Cam selection for 340 stroker

I'm not sure I get what you're asking... If you need a cam for your package, give the rest of the info.. Car, gearing, use, etc. The extra stroke is about 20%. so a very basic plan is to figure it will be 20% lower rpm for similar power. So a cam that peaks at 6K in a 340 will peak at 4800. Very simplified, b ut it's close.