ls1650

hey guys this might be a stupid question but i just wanted to know when is the right time to get a cam? i have my basic bolt ons and just got my 3400 stall recently. many people told me to wait until you buy the cam and than you should install it at the same time and lastly get a tune towards the end. my question is, should i buy any other bolt ons before i buy the cam? if yes, what other bolt ons should i consider to buy next? at this point i am considering whether to buy the cam or not. the car is not really a daily driver but i am looking into going mid to low 12's at a 1/4 mile and close to 380-400rwhp. any cam's that you guys suggest would best fit for my 3400 stall? the car is not really for drag racing. i might go to the tracks once or twice a year. but this is more of street crusin. thanks.