Basically it's a pos, they'd still use that tech/theory if it was worth a **** .lol
I'd rather use a webber progressive 2 barrel and 1 1/2 inch primary headers with all kinds of vac advanc. Probably about the worst thing edelbrock designed. Imho
Let's just say this... when you go to swap meets and see the guy with the big blue tarp littered with intake manifolds for sale....mostly... those are all the banished pieces of **** nobody wants..and you can count on seeing the sp2p intakes...should have called it "the asphyxiator"