Can someone explain stroker kits

Rani,that 4" arm is a wonderful thing,in stock muscle car type builds,like yours.Built a 408 myself,from scratch. I recommend : Scat rods,(better clearances,on bottom of bores on rod bolts,Scat crank ,over Eagles ...,& what piston \cylinder head combo,you choose?...Head flow,: at least a pocket ported factory heads,230-240 c.f.m...really helps everywhere power wise...I have no problems,with Keith Black hyper pistons on quality,KB 356 pistons cost extra,to mill the "to cut" domes down,& narrow the small con rod ends,to match Magnum 5.9 specs.(on stock la rods..).. No matter what kit you buy,have the damn thing at least checked for balance,bet it needs to be balanced. As for oil pumps,stock non high volume,with a stock pan,absolutely order Mopar part number P3690715,the hardened intermediate shaft.Cam choice,would depend on head air flow,rear gearing,& converters..