OER Parts offers a wide selection of Battery Accessories for your 1978 Ford E-350 Econoline. OER Parts offers 1978 Ford E-350 Econoline Battery Tender, 1978 Ford E-350 Econoline Battery Managment System, 1978 Ford E-350 Econoline Dual Battery System Controller Set, and 1978 Ford E-350 Econoline Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller