Tired of DIY!

If it is a common Holley, you can get new teflon bushings for the throttle shaft bores in the base plate. Taking that apart takes some care and time but it is indoor work!

Rear seals can and are often replaced in-car. A lift is a blessing so if that leak is bad enough and bothersome, then maybe that is something good to job out. I personally can stand a bit of a rear seal leak; it doesn't effect engine operation; but it depends on how bad it is, and maybe if you have a manual trans.

Some valvetrain noise is tolerable, at least in the short tern. Unless something is off or going bad, like a lobe, then that can go on lower priority, IMHO. Of course, simple preload changes with the valve covers off would not take long.

For sure change out the fuel and get that possible problem out of the way.