thanks for the info mate, hmm, high tensile sheradised would be better wouldnt it, why didnt i think of that lol, basically i want to replace them with something new thats strong enough to do its job, and sheradised bolts should stand up to weathering too. I havent even looked under the car yet to see what the original bolts are made of, but my rubbers are shot and need replacing and im an "over do it so it lasts forever" man, i also feel that the originals wont give up their position easily so might be destroyed getting them off. Also i suppose that thread pitch doesnt really matter as long a