[Mr70]

Quite possibly the most commonly used power steering pulley,in all of Chevrolets history.
I even stopped typing,as there are more vehicles listed..

Measures 5 & 47/64" outside dia.
1960-62 Passenger 6cyl.
1960-64 Passenger 8cyl.(exc.spcl. hi-perf 348 or 409cid.)
1963-66 Passenger 409cid with A/C.
1969 Passenger 8cyl. w/o A/C or 427.
1963-68 Corvette w/327cid & A/C.
1969 Corvette w/350cid & A/C.
1964-69 ALL w/smallblock,except solid lifter.
1968-69 POLICE w/8cyl.
1970-74 ALL w/smallblock,except LT-1 350 or any w/A/C.