72 360 first start question

i always feel lucky i drive a mopar. It'll run all day if i keep the throttle pegged. it sounds great but if i let of the throttle even with the idle all the way up its takes a crap. What do you mean set it at 15? When i drop the dist. into the oil gear the rotor is locked. it's one way or 180 the other way. do you mean set the gear facing #1 when the balancer mark is 15 degrees advanced vs. TDC? basically skipping a couple teeth to the advance side?
thanks