Go to your local parts store, tell them you need a sending unit for 1980 aspen or volare with a oil pressure gauge. They should have a listing. This is how mine looks
The Comp cams 260H is the cam to use, for the low compression 318. Thats what is in my 318, with headers, intake, and Thermo-Quad. Totally different beast. Sounds good too.
With that lean burn, is there a TPS ( throttle positioning sensor) on the carb. It looks there is one. Two wires going into carb on left side. Sensor is defective, or is not adjusted correctly.
First question: Do you have to take emissions test with car? If not. I woud get rid of all that crap...
The reason some shops put that disclaimer on their work orders, is that they dont take the time to do the job the correct way.
Your taking the time to do the job right. Clean wheel, clean hub= happy customer, and a wheel not wanting to go its own way. And your customer come back with problems...