'76 Dart Lite -- Budget Boost Build
If you need it, I have plenty of scrap around and plenty of fab facilities available.
Might try one of the two-pickup triggers from a mid-80's Dodge Ram for timing needs. U-pull had two of 'em last time I was there. Time one trigger for boost, one for not, with a boost switch to change them.
And you can boost reference the stock mechanical pump at those low pressures. Piece of cake.
Good luck with it! I still have my "Cobra" carb enclosure for my Dart. I need to get cracking on that!