MerCruiser 862083T 807757T Idler Pulley Adjusting Bracket 4.3L 5.0L 6.2L MPI Intake Manifolds Generally the best practice is

Generally the best practice is to just match your existing casting numbers

203244 / 0203244 Retainer

Teleflex Equivalent Part Number: CC17917 from series CC179XX (were XX is cable length in Feet)

5hp 10HP 1964-1973

but you should be able to swap this right in

MerCruiser 862083T 807757T Idler Pulley Adjusting Bracket 4.3L 5.0L 6.2L MPI Intake Manifolds Generally the best practice isPart Number(s) Included MerCruiser 862083 (Stamped) > 862083T Idler Pulley Adjusting Bracket MerCruiser 807757T Idler Pulley "Compact Power Steering" 3" Outside Diameter for 13 16" width belt For Late Model GM V6 & V8 engines. General Application Compatibility Check with your parts diagram to ensure compatibility Other Details Freshwater Used Parts Purchase with confidence!