All manual focus Pentax (PK) mount lenses will fit straight on the SA mount as long as you remove the protruding AA lever and its protruding protector moulding on the bezel ring first. If its not possible to unscrew and remove the AA lever from inside the lens after removing the PK mounting plate then the easiest solution is to snip it off flush with the base of the PK mounting plate with tinsnips. The protector moulding is usually plastic so it can be simply sliced off with a sharp Stanley knife or any similar craft knife.