More to think about.
Attached is a picture of an 2 barrel intake manifold that GMC made for their 302 engine with big port heads. The intake ports are bigger but the runners (I call it volume) is/are not that much bigger than the stock 230/250/292 manifold with a single barrel carburetor. Why didn't GMC have a manifold design like Clifford or Aussie?
For the intake design, there is a term of "precharge" and I take it that there is a critical point where the best and correct amount of vaporized fuel is desired to be available at an optimum timing of the cylinder piston position, intake and exhaust valve timing and engine RPM. Likewise there is an optimum of head exhaust port size, exhaust manifold port size and exhaust pipe diameter to get the optimum "scavenging" to help move the exhaust out faster.
I like that intake. I wish I knew about all of these old stock items before buying new stuff.
I did do tons of research before buying each part. The cam for improved low-end torque and mid-range, not high revs. The exhaust will definitely be a scavenging-type of exhaust. Yes, it will be dual, but will have a cross-over/balance pipe, and dump into single so the exhaust pulses will scavenge and help each pulse flow out the tailpipe.
I will either have a really great running engine that will do exactly what I wanted from it, or I will have a boat anchor. Being optimistic and realistic by heart, I am going with the former.
I found a photo of an inline six with the same exhaust manifolds I'm going to use, as well as the Aussie intake. Same color I'm painting the engine, too. I'm glad I found this photo, as it eased my concerns about this setup not clearing the master cylinder.
