does anyone know if I can get one to adapt to my dana 300 speedo cable port? I know you can get them for tpi's and tbi's but can't find one for a Vortec. any other ideas?

try fuel injection specalists or other places like that...i have a TPI 350 and i bought one, but i notice no difference with it or with out it...i can sell you mine if you want it :) hahahahah