The stroker is running PERFECTLY with these springs/retainers/locks, stock valves, stock valvecover, stock rockers and stock pushrods on the aftermarket Crower cam. When I installed the valve-cover, there was MORE clearance on the side of the valves... they are quite a bit smaller in diameter than the stock retainers/springs.
I cannot hear any valvetrain noise at all, idle is silky smooth and torque and drive-ability is AWESOME. For the cam I chose, I used the adjustable double roller timing set to "retard" the timing gear, bringing the camshaft to 0* of "advance". This allowed me to start and run the jeep without ping on 11 month old, 87 octane gasoline. (3/4 of a tank! whoops). I ran that easy then filled with 93 octane "new" fuel, and will run 2 more tanks of 93 to finish the break-in period... but no ping so far. lets hope the tight quench and cam timing keep the 10:1 motor happy on 87/89

I would suggest this setup for ANY and ALL setups that are planning to be N/A. The springs will handle 0.650"+ lifts and should be stable through an rpm range that would crack the crankshaft before you get valve float.