1977 240d I did something dumb and now my car does not accelerate

I went to start the car and it would not start. so I popped the hood and bridged the starter
solenoid. “ Old ford style before the starter” the car started and lurched forward, Duh it was in drive. I managed to get in the car and put it in park after applying the brake.
I look up to see that both my temp and fuel gauge are not working, I figure I’ll fix that when I get home. I put it in reverse, back out, put it in drive, and push the accelerator
And no go the RPM slightly raises but nothing else. So I pull over pop the hood and look.
I push the accelerator rod at the IP. No go, same as at the peddler. All the eternal accelerator rods are working; I can see the rod turning in the IP. So I ‘m pretty sure I’m
Going to have to pull the IP. Is this a replace only situation? Or is there a way to fix this?
I’ve rebuilt bug motors so I’m not a complete novice to things mechanical