Item #1: the EGR spacer ("injects" exhaust gases back into the intake to be re-burned. No, you don't need it, unless you get the Performer 3766 w/EGR. The 2166 performer doesn't have that capability, so the carb sits directly on the intake (or your phenolic spacer). As to whether you should use the EGR or not, that depends on your local emissions laws, inspections, and your own morality/paranoia.

Item #2: The Performer has a hole in one of the back runners for your brake booster vacuum connection. The factory one will likely fit right in.

Item #3: Having a hard time telling what you're looking at, but there are tapped holes on the Performer for most all the factory senders, vacuum taps, etc. Whether you need it or not depends on what it does, or goes to, and also see the last line of #1 again. The vacuum diagram sticker under the hood may help. Also, following the vacuum lines to their end. When in doubt, hook them up, get it running, then try disconnecting them (and temporarily plugging them) to see what stopped working, like, say, the heater control switch. Any holes you don't use can be plugged.

Vacuum requirements are at a minimum PCV, distributor vac. advance, power brakes, and the heater.

 

Good information, thanks. In that case, I'm going with the non-egr. I'm trying to unclog my engine bay as much as possible, cause I hate working around all the little wires and hoses that like to get in the way.

 

Well I sent out the money for the Doug Thorleys yesterday, and according to the UPS tracking number, they'll be here on Wednesday. It was weird though, because I bought them off eBay, but the guy (great guy by the way) complimented me on my truck that he saw in my gallery on here. I'll let you all know how they work out for me.

 

Hey, just one last question before I buy the carb... dual feed will hook up to a stock fuel line, correct? Or would I need to modify something? Thanks, Austynn.

 

Depends on what you are getting. The carb itself has two fuel inlets, one for each bowl. If that is all you are getting, then you will need a fuel line kit (which basically bolts up to each bowl & combines the two into one). The kit has an inlet which will connect to your fuel line from the pump. You might need a short section of fuel hose & two clamps to hook the two together. Some fuel line kits will also need a barb fitting to hook the hose to the kit, just to make your life miserable. Most come with it though.

If you go to the Summit website, the Holley 34-160 fuel line kit is an example of the fuel line. Note also that it does not appear to come with the barb fitting.

This might be more than what you needed to know, but I wasn't sure whether the carb already had a fuel line or not; sometimes people just leave the line on, when they sell it.