OK bowjangles YES the 76 Repu FSM is there proving you don't read and are incapable of or to lazy to learn anything on your own. Yes not learning anything about it will make it difficult for you to modify a simple carb.
Every post you have made on this forum is help carb so I figured you would bother to click a link to learn something. Instead you act a shit.
Download the 76 manual and go to page 100 that is where "Fuel System" starts.
Read it!
Good luck