i tapped the end of the hose where the brass is.i could not find the exact tap for the holley threads so iused a 1/4-24 and red loctite ,its not the rite thread but its close enough that it will stay. you just have to snug it in tight.i know it sounds like a cheesy thing to do but the threads areso close it actually isnt that bad.or you might be able to find the right tap.its not a comon size.but anyway you tap the end of the hose where it goes into each head, not the head. whats that goin in?