You might get the 3 keyway set & adv the cam that is in there now 4 deg then work with the dist subsystems in order: set initial with vac gauge method. set total (initial+slots) to 38 with the $22 FBO plate. toss the heavy spring & sub in a lighter one (mr gasket/MP/transdapt). plug in the can & adj it with a 3/32 allen wrench. You want to be a bit under the pinging point with the spring choice & can adjustment. more later if needed.