Cam Selection 360

Just a stock 340 cam and lifter set from summit would work well , do you need new pistons ? Oh i reread your post , spd-22 is a stock 340 cam also available from summit as a summit brand in a kit w/lifters
I looked up that cam. .429 / .444 x 279* x 289*. It's close to the 340 cam. .429 / .444 x 268* / 276*.