Join Date: Aug 2002
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Re: Intake Manifolds
Ahh.. in that case, a 4bbl might be warranted.
I ran a 350cfm 2bbl on my 392 for a while.. ran fine (considering the condition the 392 was in)..
The 750cfm ThermoQuad on my current 392 is probably overkill.. but that's what it left the factory with, and at least it's a spread-bore.
The 4bbls are out there for the 345/392.. take your pick between cast-iron square-bore or cast-iron spread-bore.
If you find a 392, it should come with a 4bbl intake - to the best of my knowledge, the 392/2bbl was never offered (at least, not in a pickup or Travelall).