I went into the local chain parts store today and asked about some spark plugs. I'm switching over to HEI,told the guy what I was doing. He told me HEI didn't come out on GM products until 1990.This was for my 68. I told him to look up about 75 or later. I then noticed his hat from the local Chrysler dealership. My brother finally talked to the manager who got me what I needed. The Chrysler guy was working part-time.
Dave
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68 C-10 Custom LWB
307 V8
Three-on-the-tree
Lexington,NC
davideowens@lexcominc.net