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Mild Modifications / Re: The Hugger goes ZL-1....
« Last post by hgger69 on November 26, 2015, 12:25:47 PM »
The collecting of engine parts continues....
There were two other boxes that arrived with the crank... ;D

The heads were extremely well taken care of for transportation, thatīs good! But it was a real mess to get every little plastic chip out from all small cavitations in the heads, I promise you!  :P

A big part of an engines character depends of the cylinder heads. As you are well aware of an original ZL-1 from 1969 had the heads with die cast number 3946074, aka the #074. These heads are quite common on eBay but often goes for high prices. Itīs strange but if you struggle for the originality they are the way to go and pricing goes in the same direction I guess... ::) Since our effort here is to get something close to original but not a number matching ZL-1 clone so why not go for something more spectacular like a pair of period correct "over the counter" cylinder heads from Chevrolet?

Decision made and the hunt begun...These heads, probably made for racing, has 14011077 as casting number and are often known as the #077-heads. They are not as easy as the #074 ones to find at eBay but if youīre patient you can get some for the right money....and we did!
These ones seems to be in a very good shape as being used parts and also complete with valves and springs.

Both the #074 and the #077 were Chevrolets first heads with open-chambered design. The big difference between these different heads are the design of the exhaust ports. The D-shape, or C-shape, of the #077-head is the major difference. It is said that the #077-heads will get you like 30-40 extra horsepower compare to the #074 ones.....?! :o
Here is a pic where you can see the D-shape clearly:

As mentioned before the #077-heads were "over the counter" and were never standard on any engine from Chevrolet. They were made for racing purpose only. The story is that the special shape of the exhaust port probably was a thing that TRACO, who cooperated with Chevrolet during this period, tested and found out that it worked out great. TRACO got more horsepower out from their engines, maybe due to the heads, than the engineers from Chevrolet and itīs possible that Smokey Yunick got hold of an TRACO Can Am-engine and copied the D-shape ports.

The first series of the #077-heads were made in the mid of the production year 1969 and they didn't come with a cast date number, I've been told. If I look closer at our heads I found some numbers that could be the casting date but I'm not sure how to decode them?
The #077-heads were produced as long as in the 1990:ies....

One of the heads could have been made the 2:ond of October 1974, 1984 or 1994?

...and the other one the 20:th of November 1974, 1984 or 1994?

When ever they were made they really seem to be in an excellent condition. No cracks or welding as I can see. No helicoil inserts and they have never been media blasted or painted either. The valves are stainless and appears to be brand new. The machine work done for the valves must be professionally made, the way it looks. I did a test with red spirit on the valves and they did not leak at all.

The exhaust ports have gotten some small grinding jobs too:

I don't think the light surface rust on the springs will be an issue when the motor is up for assembly but who knows..?

Please fell free to complete the history of these heads or correct me if I have written something wrong!  :)
Originality / Re: Detail Picture Request - 69 U26 Underhood Lamp
« Last post by ZLP955 on November 26, 2015, 09:05:58 AM »
Thanks Bentley, that is awesome detail, exactly what I was looking for. Nice patina too!
Brian, thanks for all that info, much appreciated. Interesting point about the dangers of the original mercury bulb switch; I guess that would likely be a hazard considering I would have to get it shipped to me by air, so am I correct in thinking the type that takes a standard bulb (therefore having the integral switch, not within the bulb) would be safer?
General Discussion / Re: adjustable fuel gauge module?
« Last post by ZLP955 on November 26, 2015, 08:56:39 AM »
Wow, that takes me back. A Shell station in a nearby town has just employed a guy to pump gas for customers. I stopped there recently, and found that after all these years of self-service, I just prefer to do it myself..... Don't want to see the guy get fired, but I felt so uncomfortable with nothing to do!
Site Comments/Discussion / Re: "Forbiden" on LTE
« Last post by ZLP955 on November 26, 2015, 08:46:15 AM »
Thanks Brian,
Not sure on our corporate ISP, I work for a state government agency and this happens both on the corporate LAN and the wireless network, WinXP (I'll have to double-check the version of IE we are using), plus on a work iPad (iOS v8.xx) accessing the Internet via VPN.
I will take a screenshot of the error message; have been convinced it's an issue at my end, but don't understand why (as you said) it doesn't recognise me as a non-logged in user and prompt me for username and pw.....
Trans-Am Camaros / Re: Penske Camaro replica
« Last post by Jon Mello on November 26, 2015, 06:22:32 AM »
Doug, the red door panels are correct depending on what race you are talking about. I have also seen blue and black door panels used.
Trans-Am Camaros / Re: Penske Camaro replica
« Last post by maroman on November 26, 2015, 05:54:13 AM »
Thanks Jon. What's with the red door panels? Was the original like that, I forget?
Trans-Am Camaros / Penske Camaro replica
« Last post by Jon Mello on November 26, 2015, 04:55:04 AM »
I saw a Penske Camaro replica at the MCACN car show in Chicago last weekend. It is one of the better replicas that I've seen and for good reason. It was built by Ron Fournier, who built the originals starting with the '68s.

General Discussion / Re: adjustable fuel gauge module?
« Last post by 69pace on November 26, 2015, 04:48:34 AM »
We have three that have full time mechanics. Most of the gasoline island is designated self-service. CT law required that an attendant be on duty to aid those with health issues to pump gas. The law was intended for wheelchair users but anyone can say they can't leave the vehicle unassisted and they have to come out and pump gas. Most stations get around it buy having no real way for the customer to contact the staff apart from leaning on the horn. I miss the ding ding.
Originality / Re: Detail Picture Request - 69 U26 Underhood Lamp
« Last post by 69pace on November 26, 2015, 04:40:36 AM »
Holes were pre drilled in the flat hoods, ZL2 Page 418 of the AIM shows that you had to use the lamp as the template and drill them on the line.

The GM service replacements had slotted holes because it was a best of bread part and meant to replace several different lamp housings across lines and divisions.

The hole in the shield was for heat escape, one supplier had them one did not. The originals came from two suppliers. Hobbs a division of Stewart Warner (these were on a ton of Chevelles and Novas) were the units without the heat escape hole. I do not remember off the top of my head who the second was.

The reproductions out there are not exact but are fairly close. I seem to remember the bottom tang is a square 2 inches by 2 inches on the warner's built ones 1 and 3/4 ish on the other. Jeff "Pace Car Jeff" on eBay has tons of these on sale all the time and usually has measurements.

On last note on the older ones. Some of them used a mercury bulb switch capsule. With age the bulb which was steel or glass can shatter and the mercury can leak. Its deadly. Most used and all the reproductions use a steel bb to complete the circuit when tipped in the right direction. You can tell the difference by the sound. If it is silent and you meter reads the circuit closed its mercury. If you hear the bb moving back and forth no health issues.
General Discussion / Re: Got My '69RS Back From Paint and Body
« Last post by rich69rs on November 26, 2015, 04:07:29 AM »
I know - when I purchased the car on 1 Nov 1991, the standard interior seats were in the car.  I've obviously had both the front buckets as well as the rear bench out of the car on multiple occasions.  The seat covering materials looked like it has been there for a very long time.  If you didn't know better when you looked at the bottom of the bucket and bench seats as well as the back of the rear bench seat you'd say they had been there from day one. 

I considered changing them, but since this is the way the seats were when I got the car, I left them as acquired. 

The rear bench seat still has the "original to me" standard interior seat material, as it was, when I purchased the car in Nov 1991. 

The first picture below, from May 1992, shows the front bucket seats and material (standard interior), as they were when I purchased the car.  Due to wear through near the seat belt retainer, I had the front bucket seats recovered in late 2013.

The 2nd picture below is from April 2014.  The front bench seats have been recovered.  The rear bench seat has not been recovered - still in "original to me" condition; i.e. as it was, with the same material, when I purchased the car.

Third picture is my trim tag.  Car was originally Dover White with a Dark Blue Vinyl top.  When I purchased the car, the vinyl top had been removed and the car had been repainted.

Who knows how or when much less why standard interior seats wound up in a custom interior car.  After all these years of owning the car with the interior as displayed, it is a moot point to me.

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