[Formulajones]

Originally Posted by Verdoro 68

Two options for a converter: the 13” Continental I’ve been running for years or a mystery 12” provided by my trans builder that is intended to stall around 2500. With this bigger cam, I suspect a new converter will be in my future but we’ll see.

Intake is a repro RAIV that I’ll be gasket matching. I already modded the carb base. It may be a weak link in terms of flow in this set up. A good old iron intake might be a better choice but doesn’t look as cool.

I can say for certain, at power levels of around 400hp, the repop aluminum intakes don't hurt anything over the iron pieces. I've tested them back to back on my mild setup. No change what so ever.
I thought maybe on something with more power you might start to see something, but as I've mentioned in other posts the 455 I built made 507hp with a stock 72 455HO intake, which is the same thing. So they still support some HP. Maybe the iron might help that one a bit but it already made the numbers we were looking for.

On your converter, your choice what you want to try but that 236 cam way out on a 114 LSA is going to idle pretty smooth anyway if installed correctly, and won't be much of an issue with idle or low speed drivability in a 455. But I'd certainly give one or both of those converters you have a shot before spending $700-$1000 on a custom unit. The converter is easy to swap out anyway.
For sure a new custom piece will perform better for all out performance or some track fun, just depends on what you want.