A 3.5 Liter engine with 6 cylinders. A rather large V6 considering the Mustang comes (or used to) in a 4.0 L V8.
I thought that my (older) Lumina had a 3.8L V-6, that’s why I was asking . . . my recollection may be incorrect.
It ain't all that sexy, but it does its job and gives me no trouble. Oh, and a used one cost me $6,000. All it's cost me so far is one round each of ignition wires and brakes, and of course the regular oil changes.
My ‘87 Caprice has the 4.3L V-6.