How is the distributor cap for an 85 Monte Carlo 5.0 305 engine?

The distributor cap for a 1985 Monte Carlo with a 305 (5.0L) engine is a relatively standard, albeit somewhat larger, distributor cap compared to smaller engines. It's round and has terminals for the spark plug wires. The number of terminals will be eight, one for each cylinder. These terminals are usually arranged in a circular pattern around the top of the cap. The cap itself is typically made of plastic, often black.

There's no single unique feature about it; it's a common design used across many GM vehicles of that era. However, you should always ensure you buy a cap specifically designed for a 1985 305 cubic inch Chevrolet engine. Using the wrong cap can lead to misfires and other engine problems.

To be absolutely sure, you should check the part number on your existing cap (if it's still intact) or consult a parts catalog (like AutoZone, Advance Auto Parts, or Napa Auto Parts online or in-store) using your vehicle's year, make, and model. They can cross-reference the part number for you.