I don't know how many configurations there are for the 1927 headlight parts, but I believe the trucks and cars used the same headlights.

The rounded rims on the bullet shaped buckets were unique to '27. 1926 had coffee can shaped cans and 1928 used the bullet cans, but had stepped (not rounded) rims.

Lurch has two different 1927 rims (one brass and one aluminum) and they each have slightly different clamps under the rims.

Posting your question on the VCCA's website might bring more info. Here's one interesting thread I found using their search engine: https://vccachat.org/ubbthreads.php/topics/377928/need-information-1927-chevy-truck.html

Maybe the original poster (Barb) has info on her headlights that would be useful.

Another person to contact is Gary Wallace (http://www.earlychevyparts.com/). He has a whole lot of used parts and is very knowledgeable about all of them.

Dean

Dean 'Rustoholic' Meltz
Lurch: 1927 1-Ton Chevy Cattle Truck
Old and ugly is beautiful! -- The Saga
Lurch's Gallery
Justin: 1928 Chevrolet AB Canopy Express
In the Stovebolt Gallery