I have a 100% stock 74 delta 88 with 34k on it. The engine runs fine, but I would like to adjust the idle mixture and remove the stock plastic retainers on the carb. The idle after warm up is low and seems way too lean. Also, I would like to cap off or remove the EGR. I am new to old carb engines and have only worked on small engines and old 2 stroke outboard engines. can someone give me some guidance