need help w/ 72 suburban - engine issues, etc.

[capev86]

1st) anyone have trouble with the idle control unit? i put a new one on my rochester 2 barrel and for some reason it won't retract all the way and let the engine idle gently when it is warmed up. it seems to stick and i have to manually push it back down. i just rebuilt the carb and decided to change it at the same time. should i throw the old one back on and see if that clears it up or could there be some other issue causing this. i don't have a manual on these era trucks (yet) so i have yet to go poking about for a sensor or something that triggers it to close.

2nd) the truck is still bucking ever so slightly except when accelerating. new air and fuel filter, electronic ignition, cap & rotor, wires, etc. haven't put in the new plugs (yet) and was thinking maybe a new fuel pump might make a difference as the old one is probably 37 years old like the truck (only 73,000 original miles). it is running about the same as before the carb rebuild except that it no longer stumbles when you first start moving. anyone got any bright ideas what it needs to get it the last little bit to running perfect. it is 95% already and good enough to take on my long trip this weekend, but want it the best it can be.

3rd) the right side "custom/20" decal just fell off. any way to repair these or do i have to replace the whole emblem. it looks like the bolts that go through the fender came off the back of the emblem. can i temp fix it with glue or do they have to be welded or soldered on?

those are my big issues for now. any advice would be great!