I'm having trouble finding out from all the myriad pictures, diagrams and so on on the WWW what are the correct bolts, or screws that attach the timing cover through the engine plate. I have in my box labelled "engine" 9 small studs UNC 5/16 one end and UNF 5/16 the other end. They are 1 & ¼ inches long. I seem to have a couple too many of these. Are the studs the ones to use with the correct nut and spring washer or should it be the correct length bolt? Where do the left over studs go?