Homer J Simpson wrote:
Carburetor or fuel injection?

Carburetor. The "Y" code 307 V8 was just about the last of the
carbureted engines in automobiles. It may have been the cleanest
carbureted gasoline automotive engine of all time too. GM got one more
year out of it, using it in 1990-model cars too. In the 1991-model
cars, GM replaced it with the injected Chevy-based 305.

I'm squeamish about the idea of pulling things off to get through the
test. I know, you do what you have to do, but that sounds as if it
would introduce a vacuum leak.