I ran MLS years back. I had Brodix BB2s with ARP studs, Gen IV block. I re-torqued the studs after a couple of cycles to try and stop the leak. I was afraid I would disturb the sealant on the studs of the threads in the water jacket and make matters worse. Never did stop the leak till the threw the MLS in the garbage and went composite. Never had a problem after that even with 10 LBS of boost.
T.J.