1993 ford f150 49l 300 runs great with out the smog pump belt size is a 8125 outer circumstance part is in video autozone. 1995 mustang 50 deleted smog pump and cheap way of doing it by just taking off smog pump and reroute serpentine belt and two bolt for the cylinder head a 5 8x18 bolt internal 7 11x14 you need . Save on smog pumps pulleys with great deals at advance auto parts buy online pick up in store in 30 minutes. The only way to find out what size belt to install on your 49l to bypass the smog pump is to use a string and wrap it around the pulleys in the same direction as the belt would run but bypass the smog pump make sure you get a belt a little smaller than the string length to accomidate for the belt temsioner it may to 2 trys to get the right . I searched this forum for the belt size for deleting my smog pump and everything i found said to use a 902 belt well i went out and bought a 90 belt and it just slipped into place without even moving the tensioner so i know this cant be right i used the belt routing that everyone posts up
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