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Pontiac of the Month

58Bonne's 1958 Bonneville

2021 September
of the Month

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Ponitac 347 rocker arms


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Having a hard time finding the correct rocker arm to fit my 347 engine.  All the rockers I find are for 7/16" studs. The one I need is 1.5 ratio and 3/8" stud.  I'm using 5/16" poly locks.  I find many of these for a chevy engine 265/350 etc but not sure if they measure out the same.   appreciate any help. 

buch1147

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Crower Enduro Aluminum Stud Mount Roller Rocker Arms - part # 72826-16 from Summit Racing.

Crower Enduro Stainless Steel Stud Mount Roller Rocker Arms - part# 73626-16 also from Summit Racing.

Both says they fit the 347 on a 3/8" stud.

https://www.summitracing.com/parts/cro-72826-16/overview/make/pontiac

https://www.summitracing.com/parts/cro-73626-16/overview/make/pontiac

If you are still not sure, call Butler Performance and get their recommendation. They are one of the premiere Pontiac engine builders in the country.

https://butlerperformance.com/

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Happy to help. Let us know how things work out. Oh, and be sure to post pictures. We LOVE pictures.

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