Thanks to an old post by member 'Motor Head', I was able to track down an ARP kit that fits the M103 as I am tired of messing around with TTY bolts. The engine specs an M12x1.75 stud that is 5.4" long.
Best way to do this is buy a Cosworth Escort kit, part number - 251.4701. This kit is made for a four popper so it only has 10 studs. You will need to line item order four more studs, nuts, and washers from ARP or a distributor.
The only quirk is you need to bend forward the PCV elbow a hair to clear the stud. Aside from that, I am back on the road with a leak free M103 (well, for now).
I have a few pictures if anyone cares, but it looks like any studded 12V inline six.