Engine bay: what isn't needed?

if you need pics i can shoot you some. ive de-smogged a ton of mopars, 3 of my own, and 5 later 70's trucks. the 4 inch round gizmobob, get it out, the egr timer, looks like a voltage regulator but has 3 wires, and is usually poo-green in color, jank that, one wire goes to the main junction usually by the master cylinder, that feeds anything under the hood that requires switched ignition power (brain box, voltage regulator, the red field wire in the alternator) the other two go to a switched vacuum valve for the EGR, ovbiously the egr can go, i always hack the dashpot off and re-use the cast base as a blockoff with some steel core gasket material to cap the hole, charcoal canister, buhbye, i use the return line to the tank as a fuel return line, via an orificed 5/16 and 1/4 inverted flare filter, 5/16 from the pump, 5/16 to the carb, 1/4 flare is orificed and i use that as a return line. i think theyre the filter used on mercury topaz's in 85-86 ish. i figure it helps the fuel pump out a bit, at least it cant hurt anything. if you dont want to do that, cap the lines. those are the main parts anyway, as stated above, a tech manual (i like haynes, theres lots of pictures) will be worth its weight in gold. and remember, check twice, hack once.