I am changing my oil lines on my 328 block to use remote dual filters. When I did this on my old 308 4v motor the thread where the oil comes OUT of the block was 22mmx1.5 ( I have the tap and die if anyone needs them). NOW on the 328 the hole is much bigger and the threads are not in any book I can find. My best guess from measurements is 26mm x 1.5. This is the kicker--there is no DIE available from any source I can locate for this die. The Tap is available, but is 50.00. anyone have the tap I can borrow? anyone have the die? Thanx Charles PS--if you want to switch to remote dual filters on your 308 I have a nice custom -12 to 22x1.5 fitting that I can sell you.