Mike - there are four generations of the Carter YH. None of them are cheap, but all of them are quality.
(1) Corvette and Nash
(2) Mid '50's marine applications, Latham supercharger
(3) 1961~ mid-1964 Corvair, also marine applications
(4) Mid-1964 ~ 1966 Corvair, Clark Cortez, marine applications.
Probably the easiest to match would be the Dearborn marine applications circa 1957~59.
You are right about the rods.
You are also right about the learning curve, but if it were easy, everyone would do it.
I have an advantage, as I can make any rod I need, to any configuration.
But if I did not have that capability, I could still get close by a lot of mathematics, and using main jets (AFB, or WCFB).
If you ever decide to go that route, call, and I can give you additional information.
Incidentally, we have sold a ton of these for multiple carb use on various sixes, plus a bunch more for a 4 carb set-up on V-8's
Jon.
