For the price of a kit, the BBD is one of the easiest carbs to rebuild ! Think you would be money ahead doing that, over buying another one that may or may not be any better than the one you have.

I have always found, especially with stock motors, that if you rebuild it according to the factory instructions (or those included with the kit), you usually end up with something very very close to perfect for your application.

Have done that with Thermoquads over the years too . . . always had em work great !! With a bit of time, and reading (go figure - read the instructions !!), you should be able to get the carb you have on the car now, running like a top !!

Why take a big block drivetrain out of a C body and replace it with a small block drivetrain ? Come on, you get the big block for another project, and still have a running/driving C body ! . . . bought a 69 Chrysler 300 like that . . . it did get the 440 later on though !!

Hope it works out for you . . .

Cheers

Mark