Hope you have a closed loop system! Im getting ready to do the same thing. I already have the Intake on it with a 4 barrel, but I am planning to put my ProJection kit on soon. As far a vacuum lines, the distributor, brake booster, and EGR valve (if you have one) has vacuum. I dont think Im forgetting anything. If you have a smog system it may require some vacuum lines too. I eliminated my smog, I live in a state that doesn't require it smog testing.
As far as sensors go, your kit should tell you where to install them. You may replace some that are already existing sensors. If you have any questions about installing your kit just PM me. I have a fair amount of experience with TBI systems. They are pretty simple!