as stated in an earlier post, i'm going to install the q-jet that i received with the blazer, the problem is i don't know how to hook up the vacuum lines on the rochester...i've never put a q-jet on. there seems to be two ports under the fuel-inlet port and one large port on the backside of the carb. any input would be helpful and much cheaper than taking this to a garage. none of my buds are sure about this installation, as they all run Holleys 1/8 of a mile at a time! also, can i install a manual or electric choke in place of the manifold choke?