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Topics - 69Z28-RS

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181
General Discussion / Vinyl Top Preservation
« on: October 17, 2011, 05:52:04 PM »
It's been awhile since I've posted on here, so hopefully this will work.

My '69 Z28-RS has the original vinyl top (black).   It is in great condition for being 42+ yrs old, but it is drying out and shrinking a little...  in spite of my efforts every few years to apply a 'vinyl top preservative'.. 
My question is:    Is there anything else I can do to further preserve this top?  My car is unrestored, so I'm just cleaning and trying to put back the few original items that I removed many years ago.  I hope to enter it in the 'Unrestored Original' category at the nationals at some point.

Any suggestions appreciated..

Gary Wylie
'69 Z28-RS

182
Restoration / Original Windshield for '69
« on: September 30, 2011, 09:34:15 PM »
My unrestored '69 Z28-RS has the PPG SOLEX DUPLATE type windshield, with a '69 date on it, but apparently this is a replacement, not the factory installation?   It was in the car in '76 when I bought it...

For an original 'unrestored' car, with all other glass original, should I replace this windshield with a repro?   

What is the best source for an original reproduction windshields?   Can you purchase with a correct date code?   US made windshield with correct thickness?  or a thinner foreign mfg?

Gary    69 Z28-RS

183
General Discussion / New Valve Springs for '69 302...?
« on: March 24, 2009, 04:50:10 PM »
I have  a pair of original '69 Z28 heads ('186') at the cylinder head shop for rework... cleaning, magnafluxing, pressure testing, new guides, new valves, springs, etc.  Everything is ready for assembly now, but the shop today told me that they seldom used the 'double springs' (with the damper inside) anymore; instead they typically use a single 'conical spring'... supposedly smaller diameter at the top than at the bottom?

I'm open to improvements, but I hate to change a good thing without understanding 'why'...
Do any of you have experience or knowledge of this spring type? And is it a good idea for a Z28/302 that I plan to rev towards 7000 rpm.... The company this shop uses is SBI (Nashville TN) for guides, valves, springs...   They will inistall whatever I want to pay for...   Any advice offered is welcomed.

184
The '69 Z28 used AC43 (non resistor) plugs originally, but I just tried to buy some at a NAPA store, and R43 was all they had.  And they didn't have solid core spark plug wires..  I'm trying to put my original 302 back 'as original' as I can get it...   so I need some help from people who recently went thru this on which spark plugs, wires, dist cap, etc...  to run..    which work well, and lose fewest points in original class judging...   Is running carbon core (resistor type) wire and resistor plugs an issue?   (I've ran solid core silicone wires for 40 yrs, so I'm not very current on what is best or available..   :)

185
Originality / Survey - DZ4053 Holley Carb (vented?)
« on: March 11, 2009, 07:28:51 PM »
Most available information says DZ4053 carbs were never 'vented', yet I've seen some on late '69 Z28's that were vented (and that appeared to be factory original).   

I'm interested in collecting information from any owners of '69 Z28's that have original carbs with the front bowl vents.   Anyone?

186
Restoration / Jack and lug wrench color... paint codes?
« on: March 11, 2009, 03:46:09 AM »
There were a few posts a year or so ago, re bumper jack and lug wrench color.  Consensus seems to be gray on the jack base, and mechanism, but has anyone identified a specific spray can color that is close to the original color, or were there variations depending on the mfg of the jack?

Re the lug wrench, I had two originals (one was gray and one was black)..  the blakc one may have been repainted.   Was a consensus reached on that?

187
General Discussion / Chevrolet Performance Manual, or 'green sheets'?
« on: February 20, 2009, 07:04:46 PM »
Is anyone familiar with the original Chevrolet Performance book?   Around 50 pages of mostly handwritten engineering information and engineering drawings and parts numbers to help late '60's/early 70's camaro and corvette racers?   It was on 'green paper', so some people refer to these as 'green sheets' I believe.  I consider it to be the genesis or forerunner of the 'later' Chevrolet 'Power Book'.... 
Are these manuals available from anywhere?  Is there any interest in having copies reproduced?

188
Restoration / 69 Z28 Cowl Induction Airhorn
« on: December 22, 2008, 09:04:45 PM »
Does anyone know of a readily availalbe Air Cleaner which has the same airhorn as the Cowl Induction AC for a '69 Z28?

189
Decoding/Numbers / PoP and component codes found in Sept '70 Parts book..
« on: October 31, 2008, 05:13:45 AM »
In doing a little digging thru a Sept 1970 Parts book (covering 1964-1970 Chevrolet passenger cars), I found very complete rear axle, trans, and engine codes for all Chevrolets (except Corvette) from 64 thru 70, and also a complete description of the data contained on the PoP's for each of the relevant years.   Is this data available online anywhere?  I know the Camaro data is available on CRG, but the PoP data seemed more complete and descriptive than what I recall from the CRG..

190
Originality / 'late' '69 Z28 Valve Cover drippers
« on: October 27, 2008, 06:54:56 PM »
Is there any evidence to show that 'late' (Sept and later 1969) Z28 valve covers had drippers?   I've owned my car since 1976; it has not been restored.   There was no evidence even when I purchased it that any work had ever been done to it, yet it had 'drippers' in the valve covers.  I'm hypothesizing that perhaps beginning at the time of 'normal '70 production' that the valve covers were updated to the drippers.   Current CRG information seems to claim that all '69 Z28 VC's did NOT have drippers?

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