'79 Turbo Regal Q-jet vacuum question

[79bird]

I've got a q-jet from a 79 turbo regal that I'm putting on a 4.1 NA motor. The motor has an Isky cam 2 steps above stock with mild porting and springs to match the cam. Bottom end is stock with about 80K on it. My question is what to hook up the vac. port below the fuel inlet to. I was told to hook this up to an external source but not wether it's a manifold or ported source.

 

[blacknight80]

If you are putting it on a na engine it won't work. They have a different bottom plate. You would be better off finding a qjet off of any other car. Someone might be looking for that carb around here though.