1. Read the thread, it's clearly laid out, but to make it easy on you...HIC just uses vacuum off the PCV line as usual and connects to the HIC unit on air cleaner. No change at all there...For HAI, search here, it was JUST brought up again, its rather simple to keep as its NOT an emissions related device.
2. Recurve is good, send an OEM distributor to
@FJ40Jim or run the primary advance vac line to the outer port of advance unit. This is mentioned a few pages back.
3. No. OEM is far superior again. Make sure it has the distributor stop pin in place. Then retime the truck.
4. Ditch Weber, those things are junk as
@Brock said
Desmog is very simple, you just need to have the block off plates for EGR, plugs for air injection nozzles and a number of vacuum caps.
Reread the document on here a few times, study the vacuum diagram. You'll get it, just takes some time to grasp it all. Once you do, it's really simple.