I have a 71 cruiser, stock motor, spring over with 35" tires. The carb has seen its better days. I have checked around town general idea has been that a rebuild is not that good of an idea. I need to know my options. the cruiser is off road most of the time with very little street use. I have been told about a 4 barrel adapter plate to a stock 2 barrel intake. 2 barrel, 4 barrel, TBI? Help...