E30 Zone

Has anyone any experience using arp fasteners on an m50 for the main bearing caps?

My problem is that the studs dont seem long enough to fully screw them into the block and leave sufficient thread at the other end for the washer and nut i.e. the nut is proud of the stud.

Haven't experience with them but i'd give ARP a ring and double check what you've got against what you should have, i'd expect the thread to protrude from the nut at least a couple mm's for peace of mind.