340 Manifolds on 318

It might only be 4 HP, maybe 5. Mopar Muscle magazine did a manifold test years back and gained 7 HP on a mild 360.
That gain would be greater with more cam,more compression and more cubic inches.
If you did this for appearances, that is another matter. :thumbsup:
Chris, another great write-up. I'll be bookmarking this. I almost have enough saved for my TTI exhaust. I've already made the recommended TTI mods to the driver's side bellcrank, so I'm hoping for no issues there. Mini starter, yes. I bought the passenger side 360 manifold and a short downpipe:thankyou: from Treblig, so I know I'll need some help hooking up that side.