Whats better timing?

Ok, i have ben playin with the timing on my 70 duster...
Its got a fresh 360, .060 over, kb-107 pistons, open chamber 360 heads, air gap intake, holley 750 dbl pumper, cam is flat tappet, .497in/.483ex lift, 235in/249ex duration @.050 and 107 lobe separation, its the comp cams mega thumpr, roller rockers, all msd ignition with pro billet dizzy...
Ok i have locked out the dizzy right now at 32deg, i kno it can use more but anything more advanced it kicks back on starter.... I also have heard in here 22deg is about where u want it to start and 36max.... I wud rather run sum kinda advance over being locked in...
But the msd dizzy only supplys bushings to get u in the 18 deg of diffrence, when im lookin for closer to 15deg....
What u guys think?? Run it at 18deg initial, and 36 total, or lock it out at 36 and get a start retard??
This is a street car, but i drive it hard like its at the track
Thanx for the imput