I have never used these, but a couple of things to consider. On my car, a 1980 TA the upper cooling line has to make a quick 90-degree bend to avoid hitting the coolant recovery tank. You may have to purchase a 90-degree AN fitting and it may still be tight. The factory steel lines are pretty rigid, so they don't flop around at all. You will probably need some kind of clamps to keep the lines in place. The factory steel lines had a clamp to the oil pan bolts. Last but not least, unless you already own them you could end investing a fair amount of money on tools to cut and make these lines. If your original lines are in bad shape, you can purchase ready bent steel lines with fitting, for probably less the $50.00.
Upper line shown, have to make a 90-degree bend to clear the coolant recovery tank.
IMG_1365 by
Lawrence Alexander, on Flickr