So you just wanted those manifolds for the crossover tube to maybe add a boost bottle later? Fair enough. Related story from my racing days, I once saw a fellow RD racer blow a piston to smithereens like ya do once in awhile, and it not only smashed the reed cage to bits but it also let the other still running non-exploded cylinder suck all kinds of tiny fragments through the bottle and wreck the piston and head on that side too. It was impressive. A rare occurrence though, and one you're not likely to run into. It took him quite a bit of work during the rebuild to make sure he got all the debris out of the bottle as well. In fact now that I think about it (20 years ago mind you) he ditched the bottle and went back to standard manifolds. Got paranoid about it happening again.