Yeah I tried m12's and they wont screw in even after cleaning the thread on the nuts with a tap.So I got the angle grinder out cut the nut off drilled the hole and now the m12 fits snug.

Just went out and measured the bolts on my 84 ute. They are indeed M12 x 1.25 x 30. Should be able to find those at any hardware store.

i got mine at the local bunnings. theyre just a fine metric thread from memory. m12 x 1.25 perhaps?
take a sample if you have one

Early means 1971. Yours both have the the late stays.

Still in need off these,can anybody help?

Hi guys that might explain it,im pretty sure I took the ones off an 84 ute shell that I had,the one I have now is a 79.Are the brackets called stays?i says in tech wiki that the early bolts are 8mm and the newer model has 12mm but there is no way that they are 8mm,im thinking 10 mm.

the ones you need are a fine thread. cant remember which size exactly though sorry

There are two sizes. Earliest 1200 use smaller bolts.

Hi guys I have just bought a bumper and tried to do a dry test fit this afternoon,one problem the new bolts that I bought for some reason don't want to screw in yet im 100% shore that they are the same as the old ones which I through away.Now the bolts that im after are the four that bolt the bracket to the car,not the ones that bolt the bracket to the bumper I have those and there is no problem with them.Does anyone have any?