Inliners International Forums General Discussion Hi Performance Edmunds 2x1 248 intake on a 302 and other stuff

I have been working on a engine for my granpa's 55.1 GMC forever. I am finally to a place I can afford a 302 and military ones are surfacing locally. About 6 years ago I lucked upon a Edmunds 2x1 labeled "248" on the bottom. I realize this is a small port intake. Would it be a huge restriction to run this with adapter rings to the larger 302 port? I could have it enlarged internally but it hurts my heart a little to extensively modify something that has lived this long. I plan on using 2 Zenith 228 carbs. I have a 11475 and a 14475. I am not sure if these are the same or not. They show for the same applications in many places. Not many threads about running dual Zeniths to be found. I plan on increasing compression to 9.25, performance cam and mildly porting the head. Is there much to be gained with the cast iron or tube header? The stock 302 exhaust is 2.5" and is about the right size for the horse power that this engine will likely make. Any thought are more than welcome. Thanks