Hooligans - After rereading through your posts and others replies, it's clear that your 270 GMC engine in the Chevy Panel may cause part of the accelerator rod length from pedal to lever (bellcrank) confusion. The lever (bellcrank) in your pictures is very different from Ed Pruss's pictured part. It lacks the return springs and such to make the accelerator function properly. I tried to zoom in and get a read on the casting number on your lever, but either I'm reading it wrong or it's not a Chevy or GMC part??? Can you read/post that casting number so we can better try to ID it?
In an attempt to help sort this out with the lever and rods you already have (making a leap of faith here that this setup was actually already functional at one point), the lever orientation and rod connections needs to change. Try and rotate the lever counterclockwise so the lower rear facing lever arm points towards the 3 O'clock position and attach the rod going to the carburetor there, with the lower rod end going through the lever hole from outside to inside. This should leave your lever with the upper arm pointing about the 1 O'clock position. Your accelerator pedal rod should then attach to that arm, with the rod end again going from the outside of the hole towards the block.
If this setup worked previously (past owner did the engine swap and had it running), and the current carb opens and closes the throttle to coincide with the rod and lever movement, you may have resolved most of the accelerator issues.
Still yet to be resolved would be some sort of a return spring to cause the accelerator assembly and throttle to close on it's own when you let off the gas pedal.
Hopefully this helps make sense of the problem and gets things moving forward for you. Come back and let us know please.
