Power piston springs come in 2 lengths depending on the carb. 2-3/16" for carb 7001374/7002050 and 2-17/64" for carbs 7002051/7003060. This info is found at: chevy.oldcarmanualproject.com in the "manuals listed in order of year" section under 1950 "Servicing GM Model 'B' Carburetor". Another way to get springs is to buy old carbs online for parts. Good luck!


Ed