Believe it or not, the next step is the easy part. Just pick up an adjustable timing chain set like the one you see here from Comp Cams (PN 3135KT; $191.29). By indexing either the crankshaft gear, you can achieve advanced or retarded cam timing. Once you reinstall the timing set, recheck cam timing until you achieve the number of degrees advance or retard that you desire. Be sure to recheck piston-to-valve clearance when you're done.