I haven't looked closely at one, but I would imagine the factory intakes could be modified to accept the 2bbl Holley carbs at the flange without an adapter.
Here's a pic of the iron intake I modified to accept Holley 4bbl carbs at the flange. The extra material required was added via NiCi welding rod, then machined flat and tapped for 5/16" threads. Since the holes go into the runners, they are capped off when not in use.
Making up fuel lines is a breeze with a good bender, and all the fittings available these days. We make our own fuel lines for Tri Power Restorations, in lieu of using what's available aftermarket.....Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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