Progress Thread 67coupe’s 89 LX - Dyno Vid

I’ll admit, I was looking for a little more aggressive sound and maybe a little more power. The mufflers that we’re on it are old flowmaster three chamber delta flows. They produced a sound that was a little flat and boring. I just grew tired of that sound.

All the youtube vids of cobras with borla stingers sounded awesome. I knew they’d be louder. But these are just offensive. Have a real blatty sound under part throttle. At full throttle, I can’t hear myself think.

Yeah, this was definitely a swing and a miss. Waaaaaayyy over the line for a street car. I don’t want to be that guy in my neighborhood.

It’s been a long time since I’ve updated this thread. I’m just ready to be finished with this room work. So here’s some room progress, then an exhaust update.

Since I removed the wood paneling in the bathroom, I decided to make a few plumbing changes while the wall was open.

This wall backs up to the garage right next to the washer and dryer. There was never a washer box installed, just a hole in the wall with the hot and cold water valves, which has always bothered me. That was one of the first things I wanted to fix.



Next on the list was adding a utility sink in the garage. Lots of soldering for this one.





After a sheet of drywall.



Also plumbed the condensate line to the new sink drain. I’ve had issues with the ridiculously long run. This should solve all of that.



Ignore the pipe resting on top of the water supply lines. That was where the old line ran outside. It’ll be repurposed for the water heater pressure relief valve.

Decided to hire out drywall. I know if I installed it, it would require way too much sanding.





This is an older pic. They’re actually coming today and should be finished.

After that, new sills and casings for the windows. Then paint, flooring, trim and I’m done! Then I can finally paint the 89!

Speaking of, decided to tackle the exhaust last weekend. Went with magnaflow full case mufflers. Had it all mocked up and tacked in place. Went to finished weld, got about 5 minutes into it and my Millermatic 140 started acting up. Had no power, no heat penetration. Just piled up wire.

After playing with the settings, letting it cool off, no change. Did the same thing even with the power turned all the way up. Did some research, even slept on it. Sounds like a transformer issue or a rectifier issue. Essentially, it’s done. I’m not paying a shop to fix an entry level 120V welder.

Decided to roll the dice with this harbor freight special.



170 amp, 120 or 240V, digital inverter. Boy was I impressed! The Miller gave me issues with thinner materials. Couldn’t lay a smooth bead. It would pile up or blow through. Had to do a series of hot spot welds.

This thing makes welding exhaust pipe easy! Really happy with it.





The Magnaflows sound perfect. A little subdued at part throttle and cruise. Nice and aggressive when you hit the loud pedal.

Quick room update, then the fun and possibly stupid news.

Drywall is finished and painted. Window sills and trim finished too.





Next up is crown molding, then flooring. After that baseboard and door trim and I’m done!

Now for my latest last minute irrational decision.

If you’ve followed the thread, you’ll remember that the 89 got into a little parking lot accident at Cruisin the Coast last year. Was still planning on going this year. I just wouldnt have a car since I wasn’t able to repair and paint it in time.

Well, the crew I’m going with potentially has an open spot on a trailer. I immediately thought, I want to take the 67. Then I realized that even though it was being trailered down, it’d still have to survive the 400 miles it’ll see during the week.

Here’s the plan. Take the 67...



And install the old 5.0!



It’s got around 200,000 miles. Burns a little oil but no noises. Ran fine when I pulled it.

Has AFR 165’s and stock cam. Going to install a small cam, swap over the front sump oil pan and pickup. Then swap over the timing cover and accessories from the 67. It’ll be carbureted with a mechanical fuel pump.

Couple quick question?

Will the 67 timing cover fit the double roller timing chain with fuel pump eccentric?

Will the distributor out of the 67 (MSD unit) work on the roller cam? I know to swap out gears. Main question is the two distributors have different shaft diameters. With this cause any issues?

Got a lot of work to do in less than two weeks. Sounds kinda like my own Roadkill experience!

Got off to a good start yesterday.

Discovered the source of the sloppy steering. The power steering control valve was loose where it bolted to the frame! The nut had backed off quite a bit. That could have been disastrous!

Then installed a new fuel pump, rebuilt the carb and took it for a spin. Drove great! Steering is tighter. Probably as good as it can be. The C4 shifts crisp and the brakes feel excellent. Just like I remembered it.

Then I decided to try to brighten up the paint. It was painted in 1980 with Emron. I know that was excellent paint back then. However the years have taken their toll. It’s starting to crack in places, it’s stained and has some really small bumps in places. I know its well beyond saving. I was just hoping to improve it.

Out came the clay bar, compound and polish. Although there are plenty of defects up close, this will definitely get me by until I fully restore and paint the car.

Before.





After!





Today I’ll teardown the 5.0 and hopefully start on removal of the boat anchor 302. Parts show up tomorrow!