Re: Carb and intake suggestions for my 540.
My 502 had an RPM air-gap oval port intake with a half inch spacer (for PCV tube), 4150 carb, and 3"-1.5" drop filter and just fit under the hood of my 66SS. When I built the 540, I used a Vic Jr intake. The measurements looked close, but the Air-gap is lower in the front of the carb pad than the rear. The Vic Jr is not. Well, Vic Jr didn't fit. The front of the air cleaner hit the hood. Ended up going to a steel cowl hood. The 540 would have fit with the Air-gap, which is what I will use if I decide I want the stock SS hood back on the car.
540 Powered '66 SS