2bbl Intake... To Make or To Find?

Sounds like Jonn has you covered. As far as adapters go, if they funnel down to the bore hole size of the 1bbl manifold, I don't know if that would be any kind of improvement. That tiny 1bbl bore is the choke point of the whole system — you can only get so much air through it without forced induction.

BTW I actually have a 1-to-2bbl adapter of some kind, that does exactly what I described. Not sure what the bolt pattern matches, or if it's even for a Mopar.