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My 84 Hurst Olds has two small additional ports on the radiator end tank besides the two for transmission fluid lines. These are capped off, but I'm wondering what they are for. Anyone know what they were used for?

At idle, the needle of the oil pressure gauge in my 84 Cutlass H/O bounces wildly. (I replaced the sensor a while ago because the old one sprang a leak and pumped out most of the oil in the pan.) I suspect there is capacitor in the gauge that dampens the needle movement to prevent this. Can...

How common is it to have difficulty filling the gas tank? By that I mean, the gas station pump's surge protector shuts off the flow. I have to fill the tank with the nozzle open only half way.

The right rear turn signal light is extremely dim when activated and may stop flashing at all after a bit. The front light seems to be normal. It operates normally as a brake light or running light if the turn signal is not activated. The grounding seems to be good. My diagnosis is the turn...

Can someone please post a picture of the cruise control linkage from the servo to the Q-jet installed in a working system? I'm trying to get the cruise control working again. I'm missing a rod and chain and possible a few other things. If I knew how the factory set it up, I could fabricate...

I was trying to replace the disintegrated coupling between the motor and transmission of the driver's seat of my 84 H/O Cutlass this evening when the plastic on the transmission started falling apart. I've heard that later GM power seat rails with 3 motors can be used. What models and years...

I'm a new 84 Hurst/Olds owner. I've noticed a strong draft blowing from the heater register when I'm at speed even though the HVAC is off and the fans switch is in Low. Is there a blend door vacuum line disconnected or a seal deteriorated? Anything it particular I should look for? In what...

Purchased an 84 H/O about two months ago. Solid, rust-free, low mileage hardtop car that hasn't been butchered. The interior is in good condition for the most part. The 307 was replaced with a stock 403 running off the computer. The 200-4R has been rebuilt for firm shifts and improved...