I just got my car and the previous owner retared the timing because he wanted a little more lump with the cam. It has a big cam, 1.7's, BBK shorties, x-pipe, flows, BBK air intake, UD pullies.. how do I do this and what setting should I start with? It stalls every morning when I start it and has trouble holding an idle until warm.. I'm hoping to alleviate this problem. Also, what $$ am I looking at to have the rear main seal replaced? Thanks..