Trying to Gauge Interest In Some Parts

2BBL to 1bbl adaptors are already commercially available and are a very very bad idea. There are 2 proper ways to mount a 2bbl to a slant. Buy a 2bbl intake or cut a larger hole into a factory 1bbl intake, mount a 2bbl flange to the top of the modified intake and now you have a 2bbl intake. Usually when they are modified from 1 to 2bbl the carb sits sideways (compared to normal) with the throttle shaft facing front to rear instead of tranversely.

And I agree a turbo exhaust header would be plenty popular. Make sure it clears factory intakes, power steering pumps, and will fit the short deck 170.