Gotta ring in on this one as I used to own 3 Corvairs.
1960-64 were the "beltline" design models, switching to the body style you're building now in 1965-69.
Most non-turbo engines ('60-'69) came with two carbs, with the exception of the Corsa models (1965-66 only) which came equipped with either four carbs, or the turbo set-up.
Turbos were offered from '62-66, and were indeed called Monza Spyders, until 1965-66 when they were called Corsas, just like the four-carbed models.
All turbo models had a single side-draft Carter carb, which was often painted black from the factory.
The turbo's aircleaner and heat shield were chrome. The impeller housing is cast aluminum. .
All engine compartment fuel lines were chrome.
The magnesium cooling fan sitting on top of the engine was typically a dark gray color.
Engine sheet metal coverings were typically a semi-gloss black.
Engine compartments in "lates" ('65-'69) were typically semi-gloss black. The inside of the engine compartment deck lid was the body color. However, the factory attached with clips a composite fiberous sound deadening form-fitting panel, which was usually a charcoal gray color. The inside of the engine compartment fenderwells (walls, fenders) had a fiberous thick insulation glued to them, this was usually gray in color.
Headlights had a polished aluminum bezel around them.
There was a distinct "turbo-charged" emblem on the rear deck lid, rather than the "110" (Monza)or the "140" (Corsa) flag emblem which would otherwise appear there.
The dash instrument panel on Corsa models were noticeably different, as they had a speedo, tach, clock, head temp, fuel, and manifold pressure gauges.
"The Corvair Decade" by Tony Fiore is an excellent resource for a year-by-year break down of the Corvair.