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Some research reveals GM did not install a cat. until the 6.5L came out in 1994, so your 1992 truck should not need to have a cat. This is what the original 6.2L decal would have looked like. I guess you are lucky in one respect, most R1s are given a new serial number and tagged as the year they...

No they would not have installed a cat. it would be rebuilt to M1097A1 specs, the 6.2L was no longer available so they used a 6.5L all other items would be the same as an A1 truck. The GM sticker you are showing looks like a civy truck sticker, all the military engines were exempted AFAIK. You...