I don't think my gauge is 100% accurate either. It acts like there's an electronic glitch as it'll jump up and almost peg out at 60 psi, and it looks like something is causing the jump. Maybe I'll get it figured out!
They make kits so you never have to cut/alter a factory harness, all your splicing occurs on the radio side of the plug. It's way better than Okie-rigging your factory wiring, you're just asking for trouble.
Are you talking about the factory radio wire colors? Are you using the factory radio plug with an adapter harness, or does the Retro Sound have the same type of plug socket so the factory harness can plug into it? Aftermarket grey wires are usually speaker colors.
The constant power is for memory, but you need to run the radio power to radio fuse directly, to the non-hot side. This should not back feed any other circuit and should burn the radio fuse first if there is an issue.
My stock 350 TBI runs about 60 on the factory gauge at highway speeds. It'll idle down to about 35, and I've changed the gauge once, a new sending unit & new connection at the sender. I also cleaned the contacts to the cluster really well when I had it apart a year or so ago. I've yet to check...
I'm in the same boat, po cut the kink/twist out of line & spliced with a short piece of rubber fuel line. I may install a new hard line this spring. Little idiocies like that drive me crazy!
This tube is for a core support intake. Where does the air cleaner point? I think that is why it was a little short for mine, as the air cleaner snorkel kicks off at almost a 90. Some, possibly yours, runs off at about a 45 toward the battery. The snorkel end is oval.
That's a Rochester Quadrajet, but all your identifying numbers are on the other side above where the throttle linkage hooks up. Get those numbers and that'll tell you what you have & the build date.
Is that nipple at the top right of carb the same size? I just can't recall exactly what it should hook to. I would think off the intake somewhere, but not 100% sure.
No, the 81-89 dash is different, you need '73-'80. Bone yard or new aftermarket. You should be able to find a non-a/c insert pretty easily. I have a sweet square honey hole junkyard I could look for you if you'd want to pay for shipping from MT.
Those aren't OEM valve covers anyway, they came on factory replacement motors like the Target Master. It looks like that's the drivers side cover, not sure what'd be for??