the stock 2wd suspension could be sourced from a G-body kit; Monte Carlo/GNX revellogram El Camino or the newly released Oldsmobiles, just like the real trucks were, for minimal fuss
I have used 2 of their prostreet chassis, neither required anything more than some flash removal and cleanup around the edges. Both were dead on drop ins for their respective kits.
for turbos i use the 3D printed ones from tdr innovations (shapeways) as they offer several sizes and are mirror image as a set. easy to work with, minimal clean up and far more detailed than any resin or injection molded unit.
can’t help with the custom parts as i’ve already chopped up the trees and chucked what i didn’t want to use in the spares pile but here’s the current decals
got several of the el caminos in the stash in both revellogram and mpc flavors so i’ll pass never really cared for any of the TD stuff but that looks cool maybe i’ll pick one up but the LUV that’s one i want and haven’t been able to lay my hands so it’ll find it’s way home
the car shown in the pic is a Holden Torana A9X (or cloned to look like) the only version i know of for sale is from the partsbox Max’s black interceptor is a 2 door XB Falcon