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Thanks for the advice here. I was looking at going with an SC grind on the cams as I have 35mm intake and exhaust ports in my heads and SSI exhaust to go with the carbs. My 40 series Zeniths have 32mm venturis in them which look easy enough to open up to 35 or 36mm as I have a rather complete machine shop here at the house and a background in such work. Knowing that the 2.7 RSR engine ran 8.5 to 1 pistons back in the day with similar intake and exhaust geometry (although more cam) I felt the combination I had in mind should get me somewhere north of the factory horsepower rating of between 165 and 175 depending on what you are reading. Trying to resurrect the CIS just seems like a tremendous amount of effort with unknown results as the gas in the entire fuel system had turned to the consistency of tar. The gas tank was the worst my tank guy said he had ever seen when he cleaned it and the fuel lines were the same just filled with a stiff dark goo which I am replacing through the tunnel with stainless steel. I like the look and sound of the carbureted engines and dont mind fiddling with them as I have had many cars with multiple carbs over the years. The engine seems to be just what it should be after my friend rebuilt it 25 years ago and my goal is to get it back on the road as a strong and durable runner. It will never be a concours car but it will be driven a lot whenever there is no salt on the roads as I like in snow country. Thanks again for the advice guys.
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