The Stovebolt Site Forums The Shop Area Engine Shop Throttle Return Spring Question

In some years of 235 engines, that tab was used with a return-spring.
In some years of 235 engines, a return-spring was attached to a hole/recess in the block/pan "rail".
In some years of 235 engines, a return-spring was attached to the brass block-coolant fitting near the middle rear of the block.
(some GM illustrations were provided not long ago in a similar discussion here)

here is a listing of different accelerator pull-back spring lengths, and clips
here is a later listing of different accelerator pull-back spring lengths, and clips