Quote:
Originally Posted by davepl
Mine's a 70 '402 but it's a C2500 (C20) - is that why it's lacking these I wonder? Or is it because it's a year older?
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Probably because it's a year older. I believe they began using these in 70-71. There's not much under parts WIKI. The oldest can I'm aware of drills down to a 1970 Chevelle & 1971 Nova/Chevelle/Camero
Edit: The parts wiki search engine doesn't always work. I found this though. By the looks of it the EEC systems began in 1970. Variances may have to do with state regulations, similar to what I think applies to coolant expansion tanks:
http://www.gmpartswiki.com/getpage?pageid=21464
EDIT: I didn't want to bump this thread, but if interested, see post #7 here. Couple parts relative to some trucks. There are variances. Some dual line senders/pumps, some single. From my angle EEC nor A/C has anything to do with it:
http://67-72chevytrucks.com/vboard/s...d.php?t=737266