Its a Holley - 70gph I think. Solex is out of the carb business, thats why they don't sell them any more. The diaphram collaspes in the pump and won't move gas. The 2.0 is limited by a lack of parts - headers currently are non- existant until blindeyed gets the one I sold him and has it reproduced; carb with a 32/36 will improve power and economy and can be adjusted and rejetted for future mods. A custom bent 2" exhaust will also help with the flow but not be too big to hurt low end torque. I can't give you numbers yet as my 86 project truck is still stock; it won't be once I have time to work on it.