Ive been searching around about converting my 3/4t truck to dual master for saftey and when i called jim carter they said they didnt have a specific listing for 3/4 or 1/2t so they should be the same. From what very little ive actually found on thr subject it says the 1/2t is a 1” bore and the 3/4t is a 1.25” bore. Has anyone used this HP-415 master on a 3/4 ton setup?