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112280 Posts in 12899 Topics by 4936 Members
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1  Camaro Research Group Discussion / Originality / Re: 69 Z28 Crankshaft number on: April 16, 2015, 07:28:59 AM
So when we say casting no is 1178, what does that mean? Is the crankshaft first a steel casting with the number 1178 cast in, then forged, then the journals, etc. machined, and then  tufftrided? Is that how it is manufactured?

There must have been some reason for the part no. change? Could the material spec have been changed?
2  Camaro Research Group Discussion / Originality / Re: 69 Z28 Crankshaft number on: April 15, 2015, 03:41:56 PM
So do we know what the difference between cranks is?
3  Camaro Research Group Discussion / Originality / Re: 69 Z28 Crankshaft number on: April 15, 2015, 02:50:29 PM
How do balancers differ 68 to 69? Is it the keyway offset? Then is the difference between cranks where the keyway is machined?
4  Camaro Research Group Discussion / Originality / Re: 69 Z28 Crankshaft number on: April 15, 2015, 10:27:59 AM
So if the 3279 crank is in this engine and was not factory installed, I'd love to hear how it ended up there. It wouldn't have been still available from GM by Oct 68, right?  (it would have superceded by the #1178 crank) And if not, it could only have come from another 68 302? Of which there were only 8,000 or so to begin with? Seems unlikely to me. Also makes me curious about my crank, since my 69 302 was assembled prior to this one?
5  Camaro Research Group Discussion / Originality / Re: 69 Z28 Crankshaft number on: April 15, 2015, 09:35:44 AM
Is 3279 the 68 302 crank no.?
6  Camaro Research Group Discussion / General Discussion / Re: your going the wrong way! 3.31 gears in a 302 powered 69? on: March 28, 2015, 07:04:58 PM
Mine Z has 3:73 w/ M20. I think it's right for in town driving. Too much gear on the highway. I'm revving 3000 at 60 mph. I also think there's a reason the 3:73 was the base factory gear.
7  Camaro Research Group Discussion / General Discussion / Re: Is it a 1969 Z/28? on: March 27, 2015, 10:57:37 AM
Mine's no tach. no gauges. Does have console.
8  Camaro Research Group Discussion / General Discussion / Re: Is it a 1969 Z/28? on: March 26, 2015, 03:49:06 PM
 Is there a tach in the dash? Wouldn't a tach have come with the gauges in the console if factory?
9  Camaro Research Group Discussion / General Discussion / Re: Just became a member on: March 26, 2015, 02:34:49 PM
All I ever get when I go to the parts store and tell 'em it's a 302in a Camaro is: "it's got a Ford motor in it?"
10  Camaro Research Group Discussion / General Discussion / Re: Is it a 1969 Z/28? on: March 26, 2015, 02:27:19 PM
That looks like the crayon mark; it's the correct location.
11  Camaro Research Group Discussion / General Discussion / Re: Is it a 1969 Z/28? on: March 26, 2015, 08:58:22 AM
I think Jimmy V said his car is a pre X code, and has it behind the seat.

Here's my crayon mark behind the seat; Oct 68 build 10B; VIN 516355. For a long time I too was under the impression that only cars with the X code on the trim tag had the mark behind the seat. Now I believe it was done from the start of production. The mark supposedly identified the build to line workers even before the trim tag was attached to the body.
12  Camaro Research Group Discussion / General Discussion / Re: Is it a 1969 Z/28? on: March 25, 2015, 03:30:46 PM
I've heard wheels were changed from AD to YH as a result of the availability of the 4 wheel disc brake option. When did that option begin? My impression has been around Jan 69, and also that's about the time the wheels changed over. How long would it have taken for a YH wheel with a 17 Dec manufacture date to make it to the assembly line? The assembly plant would also have to be notified so that the broadcast sheet could be revised from AD to YH correct? Any broadcast sheets out there from this time frame?
13  Camaro Research Group Discussion / General Discussion / Re: Is it a 1969 Z/28? on: March 25, 2015, 08:24:33 AM
I second that on the X code behind the seat. My Oct 68 build Z has it. If it was originally red with white vinyl, the stripes would be white. just so happens to be what my Z is, red with white stripes and white vinyl. I've not seen another 69 Z this combination. Mine's also RS.
14  Camaro Research Group Discussion / General Discussion / Re: Is it a 1969 Z/28? on: March 23, 2015, 03:03:59 PM

Even if it is a Z/28 acquiring every date-code correct part will take years and a lot of cash. Very few Z/28s produced early in the model year.



When did Z/28 production begin to ramp up?
15  Camaro Research Group Discussion / General Discussion / Re: ZL-1 Wheels on: March 23, 2015, 02:50:18 PM
Barn Find ZL-1??
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