Bought mine from Eaton and they made it sit up like a 4×4. Had to cut a coil off and it still needs to come down a little more. Everyone i showed this picture to thought either the motor was out or it had stands under it but the engine and trans was in it and nothing under it raising it up.
Not sure, but most of the time the different places sell the same brand of parts, I like Classic only because I live close enough so I can actually look at the part and compare them with my originals before I buy them. Classic has started coming out with some better fitting parts.
3 1/2 inches seems way high, and you'll probably see 1/2" settlement after a couple of years. I went through springs a few years back and never found them to be too high, always too low for my taste. Make sure they are rotated correctly and your A-arm bushings aren't keeping them from going down, they might be too tight, push down on the front bumper to make sure.
had a similar issue with my hood tach on my 69 400. the tach was wired to the ignition. the tach lights were always on whe the car is running. i changed and wired to the lights, no tach unless lights were on. Duh. I wired back to ignition and put new LED bulbs in the tach. it works fine that way for me. Not sure if that helps
I just did front suspension work, all new bushings, ball joints, springs, ect.
The springs are the stock springs for a 400 which I have, its a good 3 1/2 inches too high even if it settles I cant see more than an inch. They make a spring 2 inches shorter. The old springs were old and worn out and has spacers but the ride height was perfect. I am thinking of installing the shorter springs. I hate the ride height and don't want to wait for 1000 miles for it to come down an inch.
looks like the headliner trim , one looks like it goes along the front windshield, the other along the rear window, and the two top ones along the side, but they are short. Classic has the set https://www.classicindustries.com/product/1969/pontiac/firebird/parts/*r345.html
I went with the $200 ones, they fit real good, my interior is dark green and came out nice with their vinyl dye spray. I had the cheap ones before that and they were short, they might have given me the ones for the vert, either way I did not like the fit of them. mine is a 69 with deluxe interior
That set-up looks aftermarket and Pontiac never offered factory or optional, a rear sway bar that I know of. Is that even a Pontiac rear end? Do you have a pic of the differential cover? Does it have the scalloped sides?