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Re: Need HP from my Chevy 267
bout the only way to get more air into and out of that engine would be some sort of boost, and a turbo installation could be prohibitively expensive. A belt drive blower will still set you back as much as a good, running V-8 as Silicon suggested.
Strange as it may seem, you fuel mileage with a 305 is probably going to be as good or a little better than the 267. The 305 bore/stroke ratio is a lot more efficient at lower RPM. The 267 has a little better bore/rod ratio, but it's not quite enough to make up for the bore/stroke advantage of the 305. A 350 will probably get a bit lower mileage in short trip driving, but do just as well as either in highway driving.
If it runs well now, you might just want to keep it running well in stock form while you decide your course of action.
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