Sorry but the sound on those early 80's scorps albums is Mattias jabs hands and a Marshall cranked. Turn all the knobs up to 10 and back off treble and bass. At that volume the presence adds the dirt. He also had an old echoplex that gave a slight boost so you could do the same with a GE-7 or other equipment just barely boosting. Use hot pups and you are there. Within context of MTS, a Brahma module and then crank your RM 50 or 100 and get that presence full up. The MTS power section doesn't dirty as well but it will be close enough. That's the secret... Volume. You will be surprised the gain you can get from an old Marshall.