6K/8K Tach

[jl8z28]

Here's the one in mine N 708

[ZLP955]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: William</div><div class="ubbcode-body">The 8000 rpm tach was Z/28 only and entered production early February 1969. It was phased in; at the time some cars were built with the 6000/7000 rpm tach. A very few later production Z/28s had an 8000 rpm tach with a 6500 rpm red line.
Mechanical lifter big blocks used the 6000/7000 rpm tach. </div></div>
Thanks for the correction William. It's curious though that both the February 69 and October 70 P&amp;A Catalogs call up the same tach assembly number (6469383) for 'Sp. H/Per (302,396)' applications. So does this suggest that the same assembly number (6469383) was used for both the 6k/7k and 6k/8k tach heads, as there is no apparent change between the Feb 69 and Oct 70 catalog listings?

[William]

Service parts often don't exactly match production. Fit &amp; function, not appearance, is the over-riding criteria. No telling what they would have shipped if you ordered that part number. Maybe a 6/7, maybe a 6/8. I was a service parts analyst in the industry. Electronic components sometimes vary only in appearance. A supplier often dictates what you can do; they aren't going to maintain parts, production tooling &amp; fixturing indefinitely after a part is no longer used in production. So you pick one version and do a &quot;life of part&quot; buy to cover the anticipated service life of the vehicle.

There is pressure from management to limit obsolete stock at the end of a production run. A family member is the original owner of a very late production '69 Camaro SS L35/4-speed. Built with a 6000/7000 tach. Should have had a 5500/7000; probably ran out.

[Billohio]

I saw the ebay one in person. Best part on that car! Neat to see

[enio45]

my late 69 car - 10D had the 6500 red line

[Zman1969]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: William</div><div class="ubbcode-body">Car was on ebay a few weeks ago.


</div></div>
I had heard about the 6,500 redline but this is the first I have seen both my Z's were Sept 69 builds and both 6/8 thanks for sharing

[69L72RS]

Thank you for all of the replies.
I have yet to find a question that could not be answered here. [img]<<GRAEMLIN_URL>>/youguysrock.gif[/img]