Will try pressure bleeder will have to make a filler cap fitting of some kind for master as don’t have correct adapter, I have tried vacuum bleeder and numerous manual bleeding attempts with no luck, booster was rebuilt not that long ago and vacuum coming to booster working fine also has reserve canister and all parts been replaced last 5 years or so, was just putting out feelers if there is a reasonable dual master upgrade before going through original setup and replacing parts, don’t think I’m interested in a firewall mount system as truck is pretty original, thanks for the replies
