[earntaz]

Usually a long pump will have a third fuel return line -- from what I understand the reason is more fuel will move through the pump (some to the carb and some returns to the tank) keeping the fuel cooler. Also, the long pump appears to have more available fuel capacity. I just seems that the long pumps are not as prone to vapor lock as the short pump and I should add that is the pump used on many Chevy truck engines. Of course I had to slightly modify the front crossmember for clearance. Hope this is the answer you are looking for and I am sure others here will chime in if they deem necessary. TAZ