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I’ve had a head gasket failure so had to strip one head, this rocker which was purchased with a cam and other parts has gone bad, around 1000miles, luckily it’s the only rocker I replaced with these non standard items. I didn’t know I was buying a knock off part just added it to the list when ordering.
If you're looking for factory style pedestal LT rocker arms, your choices are still limited. Texas Speed has their 1.82:1 roller tip rocker arms. Harland Sharp has roller bearing fulcrum design that can be made adjustable or made for 1.8:1 ratio without adjustment. The Harland Sharp parts are a little tough to find, but GPI sells them, or contact Mr. Becker at Harland Sharp. TD Machine has part number 15014D for a stock head.
These are all I've found so far.
I’d be a little weary on whom you purchase GM parts from with the rash of knock offs. Make sure it has GM packaging and p/n’s. Or buy frrom a dealer. There are some GM dearly who sell online for good discounts.
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Non OE rocker arms 
