May 9th, 2023, 08:15 AM
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Senior Member
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Join Date: Dec 2020
Location: Friesland, the Netherlands
Truck: 1965 GMC 1500, 478 V6, SM420
Posts: 386
Rep Power: 183
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Re: Block to Oil Filter Housing Routing?
Here's what I think the ports are for. On my 478 I believe they fed the air compressor from the 1/8 NPT port before the right cylinder bank, but I bought the engine in parts. I think the rear ports are for accessory purposes.
Don't think an oil cooler would be needed in a pickup with such a big engine.
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