solenoid

Hi, Anyone here using a continuous duty solenoid for a battery disconnect. If so - where can I purchase one that will hold up to the amperage draw of a 6 volt straight 8 ?

Hey, first post, so I want to start with a "right on" to everyone on here who is lending a hand to all of us learners. I really appreciate it! I am just starting to troubleshoot my GF's ol' 62 convertible Special, with a 215 fireball. I don't have any Buick experience, but I do have some 60's...