They never put the 2.5 "Iron Duke" into the Cavalier. The Cavalier had
the 1.8,2.0 and then 2.2, 2.8, 3.1 V6, Quad 4 in the Z24 version etc..
You could probably put it in a Cavalier but would require extensive
modification of motor mounts and such. Best to find a car that
originally came with the 2.5, but has a great body and bad engine for
The 2.5 was the base engine in the Chevy Celebrity, Pontiac 6000, Olds
Cutlass Ciera, Buick Century (these cars are virtually the same car).
It was even the base engine in the Camaro for a few years, Pontiac
Fiereo (they should have used the Quad 4!), GMC Jimmy, Blazer/S10, Grand
Am, even Postal delivery Jeeps, etc.. I think of all the cars that the
2.5 lived in, the Pontiac 6000 was the best styled of them all. Real
cool car. Neat styling, interior, dashboards.
here's a ton of detail on the Iron Duke. GM probably used the Iron Duke
in the Pontiac Fiero because they also used the front suspension bits
from the Citation/Phoenix/Omega cars in the Fiero! They basically took
the FWD engine/suspension from the Citation clones and placed them in
the back of the Fiero! More GM bean counting. But I still loved the
Fiero and used to own one. A silver '84 SE model with the Iron Duke.