I remember seeing a vacuum adjusted fuel presssure regulator (for carbs )in the "new products section" one of the Mopar mags in the last couple years. For the life of me, I can't remember which mag nor can I find the article...Anyone??

This one can be vacuum/boost referenced and can be used as a dead-head or as a return/bypass regulator:

http://www.robbmcperformance.com/products/regulator.html