My first Restoration. needs help!!!!

I'm currently rebuilding my first: 360 LA Small Block Mopar; 3870230 Engine #
and my heads are i guess stock and the casting number is; #3769974

I'm not looking to do a whole bunch to the engine as this is my first car, so im really only looking to put a cam and some other smaller mods to give a little HP. i'm wondering what the highest life for the heads i have is and which cam i could stick in there before i have to change out valve springs. links would be appreciated and any other information for noobie car advocates.