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This, kids, is why this website is the fucking best when it comes to W-Bodies.

I would think bolt-on spacer adaptors would be simpler than replacing 20 studs.

The Ford rotor *hat* is shorter, the overall height of the Ford rotor is only 1/4" more than that of the W rotor. The Impala rotors bolt circle is 118mm (4.6"), the W rotor is 115mm & the Ford is 114.5mm (4.5"). The Ford rotors pad surface thickness is near identical to the W rotor thickness 1.040" vs Ford 1.101".

Bumping for any more adventures that anyone may have had with the 284. I have about 1000 miles on my LS4/ 284 combo and all seems well. I have two additional 284s in need of different repairs that I could/ would like to combine to make one like-new unit.

You're getting contact with the fender when the spring compresses, the shocks if they are single acting they don't dampen when compressing...only when they rebound. If what you have is an acceptable ride (not bone jarring) & the ride height is where you want it (even tho the fender is close to the tire), then what I suggest is a double acting shock that provides dampening in both directions. Seeing as you have mounted coil-overs you may be able to find double acting shocks for that setup.

So far, it rides better. I need stiffen them up a little because the tires scrub on bumps sometimes.

Oh, I didn't know about the J-bodies having the same radio, but it makes sense. I think some 3rd-gen F-bodies used the same radio as the Grand Prix. I'd read the same thing about the amps on the GMT400 forum while searching for info on these, as I'd wondered if I could just replace my CDM module rather than repairing it, but ended up deciding that'd be pointless as probably all of them need those capacitors by now. Anyway, I can confirm the amplifiers are 100% the same between the non-EQ and 5-band EQ models. There is no difference whatsoever between the amplifier stages. They're both using a pair of Delco DM165 2-channel amplifier ICs. In fact, I used my 5-EQ CDM (from GP radio) as a DM165 donor for my non-EQ Cutlass radio because one of its DM165s was blown. There's only one difference between the non-EQ and 5-EQ models and that's the presence of the EQ IC. In the non-EQ model, there are shorting jumpers (yellow arrows in the image) to connect the EQ input solder pads to EQ output pads. That said, there is a newer CDM with different amplifier ICs. You can tell them apart because the amplifier heatsink has vertical fins instead of horizontal. It's very likely that one does have more powerful amps. In this pic, top is old (like I have) and bottom is the newer one. The GMT400 thread did mention the old and new style are completely interchangeable. They communicate via E&C Databus, which has been somewhat hacked. https://stuartschmitt.com/e_and_c_bus/ I think Tech 1 and Tech 2 have the ability to read it with the right cartridge and cable. If it uses a CDM similar like the top one in the previous pic, then I'd bet on it.

My 88 Regal had 14inch alloys from the factory, and the steel wheels I used to run my winter tires on were 14 inch as well...which I believe were originally from an 88 ish Lesabre. Still have those winter tires and wheels kicking around, and had them on the GS last winter for storage while the alloys were out being refinished. They fit without issue. I just automatically assumed they would fit any 88-93 1st gen with factory brakes. Brake Rotors on RockAuto start showing some different fitments for 94+ cars...with some showing they fit 88-96 models, and others showing that they only fit 94-96. Not sure if that's incorrect....or if so some of models/trims started getting the larger 1.5 gen setup up front at some point. So 14 inch wheels on 1st gens is something I was definitely aware of!

No shift release and rocking doesn't help.

Apparently It’s called a spring plate. If I’m seeing things correctly, it seems like it’s used to attach to lower part of a spring compressor.

The noisy PS on my Trailblazer was instantly cured when I removed the original PS fluid, and installed GM "Cold Climate" PS fluid. https://www.amazon.com/ACDelco-10-5044-Climate-Power-Steering/dp/B007Q10PTW/ref=sr_1_2?crid=3OA5JDE3131IX&dchild=1&keywords=cold+climate+power+steering+fluid&qid=1584159184&sprefix=Cold+climate%2Caps%2C239&sr=8-2

Trans fluid? Is that what it had in it from the factory?

What did you pour in for p/s fluid?

I very recently came across some info I was never aware of..... How many of you who have owned a Lumina (base model?) were aware that a 1st gen Lumina could be had with 14" wheels? I was always under the impression 15" wheels were the base wheel diameter....... and will a 14" wheel clear the front calipers?

LOL.......so there wasn't any residual trans fluid at all?