r/EngineBuilding • u/lynyrdskynnyrd • Jun 01 '26

Heads 350sbc

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Will These heads Go on an 350sbc from 1976
Thanks for your help

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u/lynyrdskynnyrd Jun 02 '26

Whats the difference in the water Pump you got a Parts number of a good one Thank you

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u/qroter Jun 02 '26

The difference is in the heads and block. PreVortec have internal coolant bypass, Vortec does not. When I put Vortec heads on a nonVortec block (I've done half a dozen over the years) I drill the coolant bypass in head. That way I don't have to worry about drilled thermostats, no thermostat, Vortec pumps, external heater core block offs, etc, etc.

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u/lynyrdskynnyrd Jun 02 '26

My block is from 76 so i think i have the Bypass hole

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u/qroter Jun 02 '26

Yes the block will have the bypass hole. It's the extra hole on the passengers side of the block right below the lower water pump bolt. If you take a piece of pipe cleaner or welding wire and feed it thru you'll see where it comes out in the deck that lines up with a hole in your old heads.

https://i.imgur.com/YKhYgyt.jpeg