OER Parts offers a wide selection of Starter Parts and Hardware for your 1978 Plymouth PB300. OER Parts offers 1978 Plymouth PB300 Starter Motor Brace, 1978 Plymouth PB300 Starter Mounting Bolts, 1978 Plymouth PB300 Starter Motor Heat Shield, 1978 Plymouth PB300 Starter Solenoid, 1978 Plymouth PB300 Starter Rebuild Kit, 1978 Plymouth PB300 Starter Shim Set, 1978 Plymouth PB300 Starter Heat Shield Set, and 1978 Plymouth PB300 Floor Mounted Starter Switch.