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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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#56927 02/23/2006 8:45 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | If it helps, my friends healthy 261 has a stock oil pump. We did shim the relief spring with washers so it doesn't bypass until 60 psi.
To shim, he found a washer that was a snug fit in the spring hole. Addes a few washers and put on a guage with an 1/8" fitting on it to constrict the flow. Sat that in a pan of the oil he was going to run and spun the pump with a drill, usuing the priming tool. Then adjusted the number of washers.
Fred
52 3600
69 C-10
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