For 66 427 the AIM (UPC 12 page A6) shows the positive cable clearly routed from the + post thru a plastic clip on the side of the batt heat shield to the starter. Further in the AIM - for L72 spec hi perf (UPC L72 page D6) it shows the same + cable routed from the + to a clip on the firewall (just level with the furthest pass side bellhousing bolt) then to the starter - so apparently the heat shield was not used to locate the + cable for the L72. The judging manual references small block routing thru the heatshield clip but makes no mention that I could find re big block routing. In addition - I beleive the speedo cable and the solinoid harness shared the same firewall clip which is located higher up from the + batt firewall clip approximately center or the passenger side rear cylinder head. Do you agree with the above routing interpretation and is this a well known re judging criteria? My BB has this wiring set up and I am curious if it is correct.
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The AIM...
This is a good question, and I thought I "knew" the answer regarding the positive battery cable until today - more about this later. First, the speedo cable and wiring harness;
The speedo cable does NOT share the same clip as the harness - and the AIM does not show it that way. The wiring harness goes through a clip that attaches to one of the lower studs for the heater box (item 22, page A9, UPC section 12). The speedo cable goes through a clip riveted to the firewall, but not the one for the positive battery cable. The clip for the speedo cable is found under AIM option section M, for M20, 21, 22 (on four- speed cars). The speedo clip is item 5, page A4, in the M20/21/22 section of the AIM.
Now on to the positive battery cable;
I owned a 5 Star Bowtie L72 coupe for years and it had the positive cable going through the "extra" clip on the firewall (item 4, page D6 of the L72 section in the AIM). However, my other L72 car, which I just examined in the garage, does NOT have this extra firewall clip, and it DOES have the plastic retainer that holds the positive cable to the heat shield on the battery box. This perplexed me, so I went back to the AIM to check the dates on the L72 drawing for the battery cables (page D6, L72 section). The page is dated 6-3 (1965), and if you look at Note 1 (the 1 inside a circle), it says "cable drawing revised 10-14-65". Now, my car that has the positive battery cable going through the plastic retainer that anchors it to the battery heat shield was built Oct 12, 1965 - a few days before the AIM drawing change. The Bowtie car that has the extra firewall clip for the positive battery cable is a very late car, built May 31, 1966 - long after the drawing change in the AIM. I now believe that early '66 L72's probably had the positive cable anchored by the plastic clip to the battery heat shield, and cars built "sometime" after 10-14-65 had the positive cable going through the extra firewall clip, per the drawing in the AIM. -
Re: The AIM...
Everette - Great detective work and thank you for your response! I have an early April car so I do have the extra clip. I missed the detail re the clip on the heater box bolt and will check that out as mine may be missing. My AIM (printed by Millenium Industries) has poor page copies - do you have a recommendation for a better supplier for clearer AIM copy quality?Comment
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AIM copy - John Hinckley?
Sorry, I don't know who offers the best copy of the AIM. The copy I have is supposedly from the St. Louis plant (or Chevrolet, if not specifically the plant). The fellow I bought a car from supposedly had an inside connection, and the AIM I got from him is supposed to be a copy from Chevrolet. I know this guy had an inside connection b/c of other documents he gave me at the time - he had the ability to pull GMAC invoice copies from the records in the mid-seventies...
Maybe John H. can tell us if there is the possibility that my AIM copy is from Chevrolet - the copy is on very thick, white/yellow paper, with pre-printed labeled section tabs dividing the sections, and also labeled for the option sections, and it is in a large black 3-ring binder. The section tabs are not hand written, or typed, nor are they little chunks of paper inserted into the typical divider tab - they are part of the divider page itself - not your typical copy center divider. The pages do not have any vendor logo like current copies, and simply say Chevrolet Drafting, or something to that effect. John, do you think it is possible that my copy did indeed come from the plant (or maybe Terry ProTeam M. was making up these types of copies in the past)?Comment
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Re: AIM copy - John Hinckley?
Everett -
Some of the A.I.M. copies on the commercial market today show the seller's logo (Mid-America, etc.) at the top of every page instead of the Chevrolet logo; I have some from Millennium that have unaltered pages with the "Chevrolet Drafting Graphic" logo at the top, and several from NCRS that are the same way.
In production, our A.I.M.'s (at each Foreman's desk) were as you describe - big black 3-ring binders with pre-printed laminated-tab section dividers; you might have an original. These were "dynamic" books, and each Foreman's copy was changed/updated regularly by the "Specs Man" assigned to his department.
I wrote an article on the A.I.M. creation/distribution/revision process and how it was handled on the plant floor entitled "When Did That Change Shown In The A.I.M. Really Happen?" that was published in the Summer, 2001 "Restorer" (Vol. 28, #1) that you may find interesting.Comment
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Re: AIM copy - John Hinckley?
Everett, It sounds, to me, like you have a Chevrolet Engineering issued copy of said AIM. These manuals were printed in the Chevrolet Engineering Center basement by the Distribution Department. The dividers you describe were also printed in the Chevrolet Engineering Center basement by the Distribution Department. I also have AIM's with these dividers--in fact I have a NOS set of these dividers that was never put into a manual. The Manuals were sent to all Chevrolet assembly plants and various other groups within GM.
Just because you have a AIM manual that is from GM, doesn't mean that it is a "COMPLETE" manual. As John said, "These were "dynamic" books, and each Foreman's copy was changed/updated regularly by the "Specs Man" assigned to his department."----therefore all the "History" pages were round filed when a revised page was received.
ArtComment
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Thanks for the info John and Art ! *NM*
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