I dont think the turbos were the reason my rings failed. I think that it was just a poor motor, or perhaps it was the cracks i have since found in my uppper plenum. as for installing the turbos you will need to pull the motor. to get to the areas that you need to install the new oil lines as well as the turbos its probably not imposible to install with the motor in the car but well worth the little bit of time to remove it. The GT600 kit that i recived fit perfectly, as well the intake side of the compressor wheel did not leak at all because they added a seal. here is a picture

the top ones are the stock 5spd turbos. the botom ones are the GT600's. That little gold ring with the "O" ring in it seals the intake tube perfectly. If you get them you will notice that one of the wastegate brakets is bent that is intentionaly so that it will fit next to the block and motor mount with out having any interferance. I have my motor out of the car if you need some pictures of how it is suposed to look installled.