AED is very good to deal with and they make really nice stuff.....If i need a rebuild kit for a Holley I get it from them. They have the most complete and nicest kits out there IMO.
I may just buy one of their kits as it looks complete. No running out to grab something the local checker/autozone may or may not have.
BTW, have you thought about running a separate 5 gal. fuel cell and fuel system for your N20 kit? I would think that it would add quite a bit of tuneability/relability in regards to fuel pressure and save you some money as you would only have to fill the small tank with the high octane stuff or E-85.