long story short need help.im old school and did rodding before ecms so im rusty,but basically im starting out with a lg4 set up,ive gone to a stroker 383 setup,my ? is am i right to asume that the stock ecms should do just fine in these cars or do i need to go to a l69 ecm/chip or even and aftermarket one? if the stock one works what about the timing.its my understand lg4 used around 24 degrees and the l69 was up around 34,which i want.is it the ecm that gets the total advance or just the initial setting..help me .im ready to fire her up but want it to run