Quote:
Originally Posted by Brave71
Is bypass required on 260 hp crate engine?
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I am in no way an expert, but...
The reason GM gave me for needing the bypass hose on the engine we've been discussing which has Vortec heads was that the traditional small block blocks have a coolant passage from the passenger side water pump attachment point that goes up to, and into, the head and intake. This block is the same design with a passage, but the Vortec heads do not have a passageway to allow the coolant to circulate into the intake and prevent the problems mechanicalman listed in one of his posts.
So, to answer your question, since your block and head designs are old school SBC, I'd say you shouldn't need the bypass. That's just my deductive reasoning based on the GM explanation above.