picked up some 111 gas today

11.5.1 comp. went out to the shop tonight with my son and got the slicks mounted had 27/10.5 qtp now i got 28/10 m/t slicks on ..im going to try and get a good reading on the pinon angle tomm. i tried to get 1 tonight but want to ask some ???? do i get it off the front crank or the trans. tail also should i take the drive shaft out to do this?????i'd like to nail this down while i'm at it...as far as the fuel its kinda hard to find much less everybody has diff. from 111/112/116...when i turn the timeing down i put it on the pump gas but mostly i leave the timeing and just run 111 and sometimes i mix it with pump....oh we have some 100 but its like 6.00 so i just pass it most of the time..