72 TA : New Project

**tom406** · #1 01-23-2006, 05:50 AM

How are they wired? If they're wired in series (non stereo) for an 8 ohm load, they'd be just fine if there's a second set of outputs. Basically, its my understanding that whenever you drop the resistance (ohms) by half, the current the amplifier tries to deliver is doubled, and these high currents are what get you in trouble. I'm not familiar with what the factory did when you got the optional rear speaker on some of these setups. I would look at the factory wiring diagram, and just try to keep the ohm loads withing at least 60 or 70% of what the original setups were, and then avoid cranking it up excessively.

**njsteve** · #2 01-23-2006, 05:24 PM

It should have an AM/FM stereo unit (very hard to find) but I found a nice non stereo AM/FM and put that in. I connected the rear speakers off of the single speaker output wire that comes out of the radio. So I believe that would be in series, giving me one 10 ohm dash speaker, and two 4 ohm rear speakers for a total of 18 ohms of resistance. It sounded fine in terms of volume and clarity. So hopefully it won't burn anything out.

**njsteve** · #3 01-29-2006, 01:17 AM

Here's a tech tip for the day: I've been trying to figure out where the short was in the wiring for the blower motor. I got so frustrated after an hour or two under the dash that I gave the damn motor a smack with my hand and what happens? It starts working. Typical. I then sprayed the heck out of the internals with WD-40 and it works fine now. So remember when all else fails, smack it with a bigger hammer...it just might help.

**Dave Rifkin** · #4 01-29-2006, 01:33 AM

I have to say that this has been my favorite thread to watch throughout the past few months. I love to watch the progress and see the various tips and tricks that are being used to restore such a nice TA.
Keep the updates coming........I really look forward to them

**njsteve** · #5 01-30-2006, 01:16 AM

The last thing to do before taking it off the jack stands was to adjust the subframe and tighten it up. I loosened the bushing bolts and then used a tapered 3/4" brass drift to align the holes in the subframe mounts with the pilot holes in the body mounts. It worked great. I then tightened the 4 bolts to 95 pounds. I finally was able to put the T/A back on the ground again and then rolled it out of the way to sweep out the garage and clean up the workbench. I found all the little clips and nuts and things that have been flinging out of sight over the past 6 months or so. It's amazing how they all migrate to the center, underneath the car.

I Hooked up the battery and cranked the engine over just to get the oil pressure up. The factory gauge is actually still accurate. After about 5 seconds of cranking it was reading 75 pounds, which is the same as the mechanical gauge I had hooked up.

**njsteve** · #6 01-30-2006, 01:19 AM

I unbolted the rear spoiler, tail panel, rear lamps and bumper. You can still see where the remnants of the original set of tape stripes were. Interestingly, the factory was about 3/8" inch to the left of center. So much for assembly line precision.

**njsteve** · #7 01-30-2006, 01:37 AM

Here's the finished dash and gauges. I removed everything and cleaned it up (mainly removed all the dust). The 1970-73 engine-turned dash panels are nearly impossible to find in nice shape -they all turn yellow with age. I ended up disassembling mine, removing the factory clear varnish with lacquer thinner and then sprayed a new layer of clear over the aluminum. It worked great -really pops now. The switches all function properly now too, even the A/C stuff: you can hear the compressor clutch click when you trip the switch. All the gauges work too, even the clock. That was actually fun to restore. It's even rather easy, just remove the unit, take a small file (your wife's favorite nail file works perfectly) and file the set of points flat. Then spray all the gears and internals with WD-40. That's it. The clock runs, well...like clock now.

Here's the "before" shot, complete with cheesy aftermarket Grant steering wheel and stereo:

Here's the "after" shot, complete with my daughter's baby shoes hanging from the mirror -she's already claimed the car as hers.
I guess that means now I have to teach her how to powershift an M-22:

Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars.