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ProForm

Proform 66789 Push Rod Length Checker, 3/8" Studs,Blue

  • Based on 165 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Sep 27
Order within 10 hours and 18 minutes
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Features

  • Designed for 1955-1986 Chevrolet all models
  • For 3/8" Studs
  • Measures proper push rod length
  • Critical for peak performance

Description

The Proform push rod length checker is for 3/8" studs. Proper push rod length is critical for peak performance. Minimizing bent or broken valve stems, guide wear and energy-wasting valve side loading.

Brand: ProForm


Power Source: Battery Powered


Color: Blue


Item Weight: 1.76 ounces


Item dimensions L x W x H: 4.72 x 7.48 x 1.97 inches


Power Source: Battery Powered


Measurement Type: Length Checker


Compatible Devices: Human User (for 1955-1986 Chevrolet all models with 3/8" studs)


Color: Blue


Item Weight: 1.76 ounces


Item Dimensions: 4.72 x 7.48 x 1.97 inches


Brand Name: ProForm


Model: 66789


Unit Count: 1 Count


UPC: 037995667895


Manufacturer: Proform


Global Trade Identification Number: 95


Part Interchange Info: 66789


Part Number: 66789


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Sep 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Works as good as any made
Does what it was made to do
Reviewed in the United States on December 26, 2025 by Joe H.
    • a simple but needful tool
helps check your pushrod geometry
Reviewed in the United States on November 21, 2025 by Joab b begley
    • the best pushrod checker out there.
killer little checker.makes sbc pushrod length a snap.not shure how to use one look up on youtube.it is so simple to use.i needed to check my engine.as I have built many sbc's over the years I didn't like the way my rockerarms looked on the studs.this tool assured me my geometry was on but the design of the rocker arms was just giving me a false impression. ... show more
Reviewed in the United States on December 5, 2013 by T. Hansen
    • Works as design
I did not like the facts the factory did not pack this tool with instruction or even printed it on the package. Had to look for video online to figure out how to use it properly. After that I was able to find out my problem with my cylinder head. And find my correct push rod length without guessing like these old timers. ... show more
Reviewed in the United States on April 8, 2024 by SLUMPCITYFLA
    • Great no AWESOME tool
Having done rocker arm geometry for years, this tool made it a hell of a lot faster and accurate for that matter. From beginners to seasoned mechanics, this (hard to believe) tool took all the guesswork out of the process. Must have. I love the thing After putting in the P/R I bought after the measurements were absolutely perfect in length. No issues whatsoever. Hard to believe this simple ass tool made the daunting task a cake walk. Not to mention fast (10 min with motor in truck) I watched a YouTube video to learn how to use it and it worked flawlessly ... show more
Reviewed in the United States on February 4, 2022 by daniel Piontek
    • Fit perfect
Works great
Reviewed in the United States on June 10, 2025 by Toxie Odom
    • maybe i dont know how to use itneed a vid on how to use for stock stamp 350 lifter it did not work
i tried this with stamp rocker and i can not see how it works
Reviewed in the United States on April 23, 2026 by Norris Louviere Jr.
    • Must have tool to check for pushrod length !
Great tool to quickly check for proper push rod length, and correct rocker arm geometry when rebuilding a SBC, takes the guesswork out of it, highly recommended.
Reviewed in the United States on January 28, 2021 by Ross Romeo

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