desmogged

So, I have an AMC 304 (1979) so when I got it, it was partially plugged up, de-smogged, etc…. It has 3/8 MIP plugs on 3 places (2 removed currently) on the intake manifold. All 3 of the plugs had vacuum hose nipples (one had 3) on them that were rubber-cap plugged. Then there’s a weird...