273 valve adjustment???

Still a stock solid cam in it.........and I dont think I removed vaccum advance line when timing it...
Should I have removed it and along with that what should I have set the timing at then??? I seem to think it was 4-6 degree btdc?? I think it should weigh in @ around 35-3600lbs.......Still I think tuned it should be getting arounfd 16-18mpg.