advanced timing school please

http://www.ebay.com/itm/DODGE-MOPAR...3-R-/370552089507?hash=item5646a02ba3&vxp=mtr

distributor above has 18 degrees of initial advance build into it...

http://www.ebay.com/itm/Mopar-Chrys...-on-/171778548082?hash=item27fecca172&vxp=mtr

distributor above has 24 degrees of initial advance build into it and has advance springs and weights just under the rotor cap like a msd 8434.