Sticking gas pedal, It's like driving with cruise control Options

[EJP914]

Have 1.8 with sgl carb. Backing off the gas, the pedal will not completely release. There is about a 1/2" of travel before it completely comes to rest and the engine returns to idle speed. I have to pull it back with my foot to get it all the way back.
I have replaced the accel pedal (old one all rusty inside) and put in a new accel cable thinking the old one is was all gunked up. Neither of these helped. The accelerator action is just not very smooth and the gas pedal still hangs up.
What else can I check?
I have sprayed the accel pedal bushings with PBBlaster thinking that may loosen things up, but no luck.
If I replace these 2 bushings, can it be done with the pedal cluster in the car?
It doesnt look too bad looking at the Haynes manual. Take out the cotter pin on the end and the pedal pivot should come right out? And then take out the 2 bushings?
This is very frustrating and I am losing good driving days. Your help is very much appreciated.
Ed

[McMark]

Here's another remote possibility that bit me in the ass awhile back. If you install the clutch clevis pin from right to left, there is a small lip that can catch the throttle cable under certain conditions. The cable pops back off on its own. Now I only install the pin from left to right.