Thanks I'll look into rebuilding the carb and replacing the diaphragm in the process. looks like mine is a late January 76 Vin 21625 model is a LV-KCJA Engine 067275
So, After watching my dad rebuild a 75 and purchasing a 76 in 2016 I've decided to finally tear into it.
Based on the advice I have seen here the best method appears to be pick a system and go through it.
system 1 the Intake.
the first picture is my carb.
second picture is my dad's carb...