JLPurcell

Thanks for sharing your knowledge on this. That was my first thought after reading up on the subject, but then got a little off track. I appreciate this site, for its wealth of knowledge shared among the enthusiast. JLP

I am a little confused, on "The master cylinder's serial piston setup will still pressurize just with more travel, I think". From all that I can find on this subject, if it is not the vacuum assist then it is more than likely the proportioning valve. I have to say that I have not found any direct information on the 72 Z's system, but on brake systems with a hard brake pedal in general. It made since to me, due to having installed the new calipers. In further reading simply bleeding the rear brakes may center the proportioning valve. I believe that it is #10 in the illustration. I was obviously mistaken in that I thought that there was a proportioning valve in the pressure differential switch as well. In the race car with MK63's the brake system was re-plumed with adjustable proportioning valves when built. I will make sure I still have the proper vacuum and then bleed the brakes starting with the rears and see if that resolves the problem. Thanks for the information. JLP

I installed Sumitomo MK63 Calipers and vented rotors on my 72 Z recently. I have experienced a hard brake pedal since that installation. I tested the vacuum assist and I believe it is working. I pumped the brakes, held pressure and started the car and the pedal depressed slightly. I plan to put a vacuum gauge on it tomorrow and see if I have at least 18" vacuum. I believe the next possibility is the brake valve (Pressure Differential Switch). It may have moved off center during the installation and bleeding. I am looking for a NOS brake switch / valve just in case. Any leads out there for this part or any other NOS brake valves or proportioning valves for a 72?

NO, that is a integral part of being able to afford to properly restore the car. I can tell you that it would have been more lucrative if I have parted out the car, but I believe that we have to save these cars!

4574 has been sold and picked up by a member of the site. He has full intention of restoration. I took a loss on the car in order to help the member justify the restoration. I hope we get to see the progress as it is restored, but that will be up to the member.

I am looking for a JDM Grill for period correct upgrade to my 72 Z.

Les Canaday gave me a call yesterday. He let me know that he is selling my old HLS30 -00029 race car. A year or two ago I would have purchased it back, but I have taken a different direction in the past few months. If anyone is interested they should contact Les.

Then how about these VTO's.

VTO's without question.

A short note on this project. I have decided that this project is not one I want to take on at this time for a number of reasons. I will update the post on the car as it sits in the near future. I hate to see these low number Z’s parted out so I will first offer it to members who have the intention of restoration. I am willing to take a loss on the project if a member is serious about restoring this car. Contact me if interested. Thanks Jerry

HLS30-004574 A short note on this project. I have decided that this project is not one I want to take on at this time for a number of reasons. I will update the post on the car as it sits in the near future. I hate to see these low number Z’s parted out so I will first offer it to members who have the intention of restoration. I am will to take a loss on the project if a member is serious about restoring this car. Contact me if interested. Thanks Jerry

http://www.classiczcars.com/topic/46443-antenna-rebuild-restore/?tab=comments#comment-422312

No offense taken Chris, I do not know about the GT40's or the clones etc... I have not talked to Dave yet, but I assumed, and you know the thing about assuming, that when he said that he found a chassis in South Africa that he was talking about an original chassis. He continued to say that he had it directly shipped to N. Carolina for a full Olthoff Racing build, we have a 600 HP beast at just 2,000 lbs. Chris, no intention to mislead just knowing this guy I made an assumption. Thanks for clearing that up for me. JLP

Dave's Viper......... I will have to take a look at photos of his military tanks and post them when I get time.

Chris, I will have to give him a call and check. But according to his post he found the chassis in South Africa and had the car rebuilt to original specs. Maybe he is pulling my leg? He has a bottomless pit for resources. He has a number of collector cars and a larger number of restored military tanks, (his true passion), from all different countries and time periods. All are restored and in working order. I will have to give him a call, good opportunity to visit his man caves.

I have a friend that collects "Tanks" and cars. His latest project was to find an original right hand drive Ford GT40 and have it cloned to original race specifications. Here is the result.... I would be lying if I were to say that I am not a bit jealous. Dave has great taste in cars!

Looking for calipers or brake pads for the MK63's? I have an extra set that I believe that I will hold on to, but they are out there. There are two different configurations, I believe that there is a difference in the pads for the MK63 calipers for the vented rotors as apposed to the pads for the non-vented MK63 calipers. Kats would be my go to guy for information on these calipers and pads. I know there are companies out there that will replace the brake material on your backing plates as an alternative. http://www.remaninc.com/aboutbrakepads https://jdm-car-parts.com/collections/skyline-1969-72/products/reproduction-mk63-front-brake-pad-set-for-skyline-hakosuka https://global.rakuten.com/en/store/parts/item/aa71-f8f010-2/ https://buyee.jp/item/yahoo/auction/j448607503 https://buyee.jp/item/yahoo/auction/j448607499

I have been thinking about setting up a couple of hives. I really like fresh honey and from what I have heard local honey can help with pollen based allergies. Looks good!

Bump this thread.

I removed the blue interior panels in the 70 and plan to dye them with SEM or custom mix vinyl/plastic part paint. I noticed that the interior vinyl is an "Ice" metallic or pearl looking blue, but the back of the plastic panels look to be a solid blue. Were the plastic panels solid blue or were the fronts painted to match the pearl look?

Thanks for the advice!

Cleaned up the 3 remaining "D" hub caps tonight. Very pleased with their condition!

Yes, all 4 and all are in this condition. I just randomly picked this one to clean up tonight. I will clean the rest as I get time.

Went through the ignition system this evening. I did get spark at the points, but not plugs. I will replace the coil, condenser, points and plug wires, that should get the ignition system working well. I did drain the fuel from the tank and ran a couple of gallons of gas through the tank did not get any rust, but I am not taking that to the bank. I took a few minutes to clean up one of the original early "D" caps. They all should turn out the same. I believe they were probably on the car for one set of tires and came off when the "Mario Andretti" punch outs were installed. The caps are absent of any curb rash, dings or dents.

Had a little time this evening to do a few checks on the engine. Completed a quick valve adjustment "cold" the exhaust were fine the intakes were tight. Once the adjustment was complete I did a compression test. 150#, 160#, 160#, 80#, 160#, 120#. Not bad for an engine that has not turned over for 34 years. I believe that I might have stuck rings on #4 cylinder. I will continue to soak the cylinders and do a leak down test at a later date. Overall pleased with the results. I tried to check the timing and dwell and found that I have no power to the distributor. I will do some checking of the ignition system when I have a little more time. JLP