I got to wondering how a Forest Service vehicle was ordered so I took a photo of the RPO codes in the glove box, found a decoder sheet on the interweb and started decoding the 62 RPO's listed.
I was able to decode all but 11 of them. I was surprised as to how many changes had been made to the truck since the factory. The SPID showed it originally was a 4.3 automatic 3 speed with OD and a roof rack. After reviewing I the list closer I started to question the decoder list I was using. Maybe it was for a different year or brand of GM vehicles. Then I got smart and compared the VIN number on the SPID to the one on the truck and found they don't match!
I guess someone swapped glove boxes or dash boards at some point.
Oh well it kept me amused for an hour.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread
http://67-72chevytrucks.com/vboard/s...d.php?t=698377