Colour really is a very personal thing & I try to not get involved in picking colours for my customers cars. However, being as you're not a customer lol, if I had to paint a silver car, I'd paint all of the bodywork ie outer panels silver with either dark grey metallic SS or Z28 stripes,you know almost a charcoal colour.Full underbody in dark grey metallic, engine compartment/firewall dark grey metallic, rear axle & suspension satin black, front subframe satin black, suspension arms silver & inner fenders satin black. These colour combinations would give a very nice contrast with each other & all of the aluminium parts you intend to fit. The nuts & bolts to hold it all together would be stainless OR, cad plated, again giving a nice contrast to the parts they hold together. Might be nice to paint the centres of the wheels dark grey metallic as well to match it all togther. HTH
Oh yeah, silver engine.