What is the correct brand (manufacturer) for headlight for my 1984 Cavalier? It has four headlights. Also, what is a source for the correct radiator cap?
Thanks, John

John, you want the "Guide Power Beam" rectangular headlights. They will come in a blue/white box with red letters. Seen them many times on ebay. I will check it out and get back to you.

High Beam is Delco PowerBeam # 4651
Low Beam is Delco PowerBeam # 4652

http://www.ebay.com/itm/Delco-4651-...art-NOS-/381291082286?hash=item58c6b8322

http://www.ebay.com/itm/4652-DELCO-HEADLIGHT-/151686952976?hash=item23513f3810&vxp=mtr

Radiator cap is AC Delco RC27

http://www.1aauto.com/radiator-cap-...NXujs0DjKuJuov5G7hGWZeTZoF23UaAsYO8P8HAQ

John made a later post that I responed to. At the Middle
West Meet I checked the sealed beams on a 1984 Monte and the POWER BEAM name was not on the lens. Just guide and sealed beam.
I believe I also saw the same on your convertible.

The Power Beam bulbs in our 74 Nova have POWER BEAM in a circle in the center and GUIDE at the bottom of the lense.

I believe the Power Beam was discontinued for the flat, square headlights.....that iis name on the glass.

Guys, it doesn't say powerbeam on the light itself, it just has GUIDE at the top. However they were called powerbeams and put out by AC/Delco in the 80s. Check my links to NOS lights