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Old May 14th, 2023, 12:38 PM
Prowbar Prowbar is offline
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Join Date: Dec 2020
Location: Friesland, the Netherlands
Truck: 1965 GMC 1500, 478 V6, SM420
Posts: 383
Rep Power: 181
Prowbar is a jewel in the roughProwbar is a jewel in the roughProwbar is a jewel in the roughProwbar is a jewel in the roughProwbar is a jewel in the roughProwbar is a jewel in the rough
Default Re: '65 GMC 1500 project. From the Netherlands

Here is a video of the second run:

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Runs much better, throttle at idle wasn't opened far enough and we retarded the time some. Two of the valve lifters are spinning slowly, and two aren't spinning at all, these will be replaced with new Melling lifters from Rockauto.
For the experiment, I switched two lifters around, a fast and slow turning lifter, and the lifter is at fault, with no proper crown. These are the OEM lifters.

Lifters are easy to change, back off the valve lash adjustment, remove the pushrod and use a stick magnet to retrieve the lifter.

The 305 starter doesn't have the oomph and drains the battery rather quickly, have to figure out what causes it.

The haze from the manifolds is the paint baking.

Last edited by Prowbar; May 14th, 2023 at 04:29 PM.
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