Zed Head

MSA sells an ABS coupler ($13) and a PU version ($15). ABS is definitely a hard stiff material, like black sewer pipe. PU is in between ABS and rubber in stiffness. http://www.thezstore.com/page/TZS/PROD/23-4161 http://www.thezstore.com/page/TZS/PROD/23-4160

You live in a very very expensive region of the country. If you really want to get it done, you might see about driving a few miles out of the area. I live in the Portland OR metro area and I've found that I could save a lot of money for machine work (driveshaft shortening, for example) by driving up the Columbia River gorge about 30 miles. City living is expensive. Definitely seems like a lot for a head you don't really want. You could buy a complete L28 for that money around here.

Not sure why people don't like the polyurethane (PU) unless it's a combination of factors. I have the PU coupler, with 205 70/14 tires, cut springs (about 1" lower) and KYB shocks. Feels great, no shocks or harsh road feel through the steering wheel. That's with PU T/C rod bushings (front, rubber in back). The PU coupler is inexpensive and easy to change. Worth a try, I'd say.

Same vein - check the separator between the two sides, the exit tubes, in the exhaust manifold. I bought a ZX engine and that separator was complete rotted away. One giant cavity. Make sure the parts are worth saving. I also spent a bunch of money having a manifold resurfaced and a stud removed. The guy went to the maximum of his estimate range (of course?), he couldn't let the broken stud beat him. I paid the price. Should have just bought a wrecking yard replacement. Didn't know better at the time.

Just thought of another trick I've used to put in as little heat as possible, to avoid unintended damage like warpage. Put tension/torque/compression on the tool used to do the pulling/turning/pressing. Up to the limit before you think think things will be damaged. Then apply the heat. When there's enough heat things will move.

Good luck on the studs. I used MAPP gas myself, just takes a little more waiting. Check the back side of the stud holes, one or two of them might have broken through during tapping. You can get a bit more thread penetrant in that way. I had one stud that absolutely would not come out. There was 1/4" left to grab on to. I drilled a hole completely through it and squirted more rust breaker in that way. It was one that would only move when the manifold was hot, even after several rotations. It squeaked. They key to removing broken studs is anger control. So tempting to just say "screw it" and bust the remaining stub off with a twist. Then you're really screwed. Check that manifold surface for flatness. It probably needs a resurfacing. Don't remove too much, the retaining "washers" have to bridge the gap to the thickness of the intake manifold.

It probably was not the diameter of the pipe that gave the sound. There must have been a muffler involved somewhere. 3" is probably also overkill for a stock L28.

I was kind of wordy. My basic point is "match the set of parts by quality and life expectancy". If you install new seats to last 20,000 miles (2 years) but the guides are only good for 5,000, you're not getting what you thought you were going to get. The way to do it, I'd say, is to inspect everything, make a list of what's needed and what gets you where, and execute a plan. And if you have an undesirable head, you might not want to spend any money on it. I'm just the voice of economy. I ran my coolant leaking N42 head for 20,000 miles on two cans of Barr's StopLeak, instead of pulling the head to replace the head gasket (when I would have also found that the head was warped). Then replaced the whole engine when I got tired of it and was sure that my spare engine was in much better shape. I was in your boat at the time. Low cash flow.

Seems like you might be getting ahead of your self. You started out simply cleaning up some valve seats now you're about to replace them. But you haven't really inspected the rest of the parts. Might not be worth new seats. After you check the valve guides for wear, and the valves themselves (the stems), and the cam lobes and the rocker arms (you know which rocker arm goes to which lobe, right?, hope you didn't randomly disassemble), and add in the cost of new valve seals, you might decide that the ten thousand miles still left in those old worn seats will get you by until you have the cash to do a complete job.

Did you get this book yet? It's pretty good. https://www.amazon.com/Performance-Fuel-Injection-Systems-HP1557/dp/1557885575 https://www.diyautotune.com/product/performance-fuel-injection-systems-hp-books/. There is a variety of areas that people have problems with - computer technology to connect to and program MS, the fundamentals of EFI, how to get their parts to work with MS, etc. MS projects are multi-disciplinary.

Ahhh...that was not clear at all. You recycled the PO's ad. When you put your "south of Olympia" at the bottom of the ad, it used the CL font, not the classiczcar's default font. Looked like it was part of the CL ad. So what's the new price? The Kingston price from the PO or do you have a new one? You really should make a new ad.

I've studied it but don't have it. You could just throw things out and see if the bounces make sense.

I've read that the stock manifolds flow pretty well. It's the pipes after the manifold that offer the most potential. Bigger from the manifold back. It would be a bit pointless to go with headers but stock size pipes to the back. No offense to those that have done that. Those three exhaust studs are really difficult to remove. If you try it use lots of heat. I've had some that would only move when everything was hot. As it cooled I couldn't turn it any more. If they look like they'll last a while just clean up the threads and leave them. You'll probably break them trying to remove them.

So it was in Centralia? You might not realize that you never actually said that you saw the car in person. You reposted a CL ad, but didn't say you visited. I was just trolling the voices in Marks' head, since south of Olympia is probably within his exploration range. 2675 isn't far from 4718.

Yes, Kingston is across from Edmonds, north of Seattle. Could be the CL poster was just advertising on several venues. Thought you might have your shed built. That yellow 280Z is still sitting up on Skyline Drive. Rotting away.

I was just making the point about the general weakness of the system. It's sensitive, it won't brute force its way ahead like my Pathfinder system, which actually bent a wiper arm when I turned them on with a blade frozen to the windshield. Once I got all of my components back to their 35+ years ago level of cleanliness and corrosion, and the electrical system up to par, it works fine.

Kingston isn't just south of Olympia. Maybe in Tenino, Chehalis or Centralia. Maybe close enough for @Mark Maras

Seems like the sealers are more designed to save tanks with potential pinholes, thin spots, cracks, etc. If you have solid steel, the cleaning and rust removal is probably enough.

How about this guy - http://forums.hybridz.org/topic/125760-wtb-240260280-little-to-no-rust-oklahoma/#entry1176292 You're not contiguous but about as close as the other end of Texas probably. It may get butchered though.

The motor is so weak and voltage sensitive, and the alternators so close to the edge at idle speed, that every little bit helps. There are many many wiper motor "upgrade" threads out there. Even the type of wiper blade probably makes a difference.

There is a ton on this site about how to value these cars. Matching numbers, rust, provenance, all of that. You've asked essentially the same question multiple times. Really looks like you're just trying to set a flip price. You haven't asked anything about how to restore them or where to get parts. Might be why the response is muted. Nothing wrong with buying and reselling, but the beating around the bush will get old. Why not just put it on eBay with a high reserve? Post lots of pictures. We'll pick it apart and when it doesn't hit your reserve number you'll have a high bid to guesstimate the price. There's a guy in Beverly Hill CA that does that over and over. Beware though, that now that "harmony01" car and all of his cars actually, is/are tainted with all of the bad press. I doubt that anyone from this site would buy it for what the guy's asking. He's had it up too many times, it's old news. Who wants to be the sucker that finally paid maximum price? Just pick a good profit for your time, add it on, and resell. Everybody wins.

Forgot that the guys who know stuff are in Toronto - http://zccazconvention.com/conventions/2016/ You;ll have to wait, or you could head up there. http://www.classiczcars.com/forums/topic/55368-zcon-2016-toronto-who-is-going/ http://www.classiczcars.com/forums/topic/55903-zcon-2016-pics-with-love/ @my1st240z

Browse around the site. The link below has a some threads about cars on eBay. Somebody will join the thread fairly quickly. Maybe a buyer. http://www.classiczcars.com/forums/forum/79-internet-finds/

You might as well say it outright if you're looking to flip it. That looks collectible and I'm not a collector. If you're looking for a restoration project, that's a good one and this is the right site to be.

Post some pictures, or a link to the ad that had the pictures.