school me on stroker smallblocks

so i think i messed up the balancer threads in my 360 lol. maby im just lookin for an excuse to have to get a new crank lol. but its bored .30 or .40 over cant remember at the time but all i would need is a crank and bearings? or what? and how hard is it to do for someone that has never done it before? i have tore apart engines and put them together but never really done perf stuff lol