When I did the LS1s I used the B-body lines that I had used for the B-body brakes. I think these lines are alittle longer than the stock G-body lines. IMO the lines I'm using are actually a bit too long for this, but should work okay. The fittings are fine. You do need the LS1 banjo bolt. I've heard some people using the G-body style bolts and modifying them to work, but for $6 the correct ones are easy to get.