ACCORDING TO MY BOOK 761 means black vinyl and the A means bucket seats. my book must be incorrect but this puzzles me as I see a lot of 67 and 66 SS at shows with the 761A on the trim tag that have black bucket seats. Maybe they all were changed from bench seats to buckets ---- ????????
Your book is wrong. Where -A and -B do appear -A is bench and -B is bucket. The -A or -B is redundant and used only by Atlanta, Framingham and KC; Baltimore and Fremont did not use -A or -B. The 761 trim code is for black vinyl bench
seat and 763 is the corresponding code for black vinyl bucket
seats. The same way that 747 is red vinyl bench and 750 is red vinyl buckets. Why did some plants use -A or -B and some didn't? Who knows? Why did some plants put a dash between lower and upper body colors (e.g., R-R) and some didn't (e.g., RR)?
All 5 U.S. plants had different types of tracking numbers (or reference numbers if you like) on body plates. As far as the cars seen with bucket seats but having 761A on the body plate, bucket seats are an easy swap to make just like painting Sierra Tan cars Bolero Red to make them more 'appealing'.
Atlanta, Framingham and KC were the only 3 to have group option codes below the trim code - Baltimore and Fremont did not. Baltimore has a 3-digit number to the right of the body assembly date that corresponds to the job number on the Trim Broadcast Sheet showing the option groups.
Other numbers vary on all 5 assembly plant plates as well.
* Atlanta has a 6 digit number below the trim code.
* Baltimore has the 3 digit code as mentioned above plus a 6 digit code number below the paint code that matches the number in the Identification Number block of the Trim and Body Broadcast sheets.
* Fremont has two sets of tracking numbers, one below the trim code and one below the paint code. Up until at least December these were a 5 digit number below the trim and a pair of 2 and 3 digit numbers below the paint; by January this had changed to a 5 digit number below the trim and a single 6 digit number below the paint.
* Framingham doesn't have any tracking numbers but has a single letter in the upper right hand corner.
* Kansas City has a 4 digit number just to the right of the body assembly date.
Both Atlanta and Fremont also have a hand stamped number (like the 13 on this tag) that other plants don't have.
Plants must have ways of tracking a car during assembly so workers know what parts go on what cars and each plant had their individual means of doing so. Obviously Framingham was the only plant that didn't feel the need to put this information on Chevelle body plates.
While these extra numbers don't tell you specifically anything about the car, if, IF one found the corresponding paperwork, they would. Just like the 3 digit number itself on Baltimore tags doesn't specifically tell you what options were included in the option groups, finding that trim sheet with the matching job number will tell you. Likewise the 6 digit ID number on Baltimore tags, find the Body Broadcast Sheet with that number and you find a wealth of information about your car.:thumbsup: