On my 78 Blazer, the original owner yanked all the emissions crap off (kewl), and was running the distributor directly off of a carb vaccume. I believeon the original setup it pulled vac from the ported vaccume switch in the thermostat cap. The main problem I'm having is that it feels like my timing is not right....NO POWER on accelleration. The timing is set right w/ vac line disconnected and capped, but I'm thinking that when I reconnect it for normal operation it is automatically advancing the timing. Anyway this thing should be "getting it" and it's not (only 20k on engine, rv cam, new carb, edelbrock intake, headers, and I ported and polished the heads). The thing runs great, but feels like I got the e-brake on when I drive..ANY idea's are appreciated.