Aftermarket carb for 273 commando

You need an Edelbrock 1481 adapter and maybe a different upper radiator hose, that one looks to be pinched shut right above the thermostat.
Yeah, I'm just gonna put the original hose back on, not using as a dd or long trips, just to cruise around town. The secondary bbls clear so no issues with fitment. Perhaps the intake was machined. Before driving or starting checked to make sure the butterflies opened all the way after installation. No binding