Review on Proform 66790 Length Checker Studs by Marcus Amillion

Name: Proform 66790 Length Checker Studs
Item: Proform 66790 Length Checker Studs
Rating: 2

September 15, 2022

Nothing for powerful engines.

I bought this to see how accurate it would be compared to using an adjustable pushrod and replacing the valve spring with a tester spring. I was within 0.075 of my actual length, which is probably fine for your average motor. If you build a motor and put your time and money into it, use a more accurate method to measure the test spring).

Pros

Designed to fit all Chevrolet models 1955-1986.

Cons

communication with the seller.

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