The Stovebolt Site Forums The Parking Lot Tons 'o Fun 1968 GMC Bread truck project and a couple questions

Hey everyone! In the '90s my dad converted this 1968 GMC step van bread truck into what he calls the "Love Wagon" complete with a sink, 3-burner stove, and a fold away king size bed. Its tags expired in 2002 so I imagine it's been sitting for nearly as long. I've decided to get it back to its former glory. The interior will need some revamping and deep cleaning as it's been a mouse condo for two decades. Luckily the entire truck is encased in aluminum so rust is practically non-existent.

The engine is a Chevy inline 6 that I'm assuming is the 292 version, not sure yet. I haven't tried to crawl into the engine bay to get the definitive answer on that. The amazing thing about this engine is that with some fresh gas, a new battery, and coolant it was happy to run and maintain its temp. I couldn't believe how easy it was. The clutch and trans seem fine too. I was able to break one of the rear brake drums free by using engine power (other one is still locked due to the diff taking the easier route).

The issue I'm having is that I cannot for the life of me find a VIN decoder that works with the VIN on the title. One enclosed picture shows a serial number located on the outside of the engine dog house. It is totally different from the VIN on the title. I assume this is a separate number that Grumman used for its body manufacturing. Does anyone know how I can decode this VIN and figure out exactly what this thing is? Also, what's the trick to getting seized brake drums free? Run a couple screws into the threaded holes? Beat it with a mallet?

It's a 1968 GMC, VIN # PS3650PPC1704B. The serial number in the cab (as shown in the picture) is 18845KVC6712A.

Any hints and/or pointers would be really great.

*EDIT* Forgot to attach the photos. Here they are!

According to this page, https://gmcpauls.com/67-72_gmc.htm your truck is a 67, as it has a 14 digit VIN as opposed to the 13 digit VIN of 68 and 69. I have yet to find out where the VIN is stamped on the frame. You'll possibly have to research glider kits or rolling chassis production to find the location of the serial number on the frame. It ends with a "B", so you know it's in the 60001-10,000 GVW range. Find some vintage shop manuals and they'll probably give a location.

Post a photo of it. There was a big difference in the body of a 67 & 68. Look up around the wind. wiper motor if it is above the windshield. Some had a plate up there with #s on it. Look on the strg. column behind the dash. Some were there on a little tag.
Those are fantastic trucks. That body is nearly indestructable.
George

Thank you so much for the gmcpauls link! That's exactly what I was looking for.

I've attached the photos, and the one shows what I believe to be the chassis serial number, completely different from the VIN on the title. The tag is located on the side of the engine dog house.

Photos have been added to the post. Thanks for the response!

292 engines have a pushrod cover that is about 6” tall, all others much shorter.

ED

That looks like a 67. The latter ones had a slopping hood that opened in front. The engine looks like s 250. The carb is a Roch. monojet 68 up. Its been a long time since I worked on those. I may be wrong.
George