Nt being sure if this is a SB but if so you may want to invest in a Cloyes timing tensioner before you degree the cam it will help keep any slap out of the chain.
http://www.amazon.com/Cloyes-9-5387-Engine-Timing-Tensioner/dp/B0026M7VSE

Living with ALS help support the search for a cure
Thanks http://web.alsa.org/site/TR/Walks/WesternPennsylvania?team_id=347781&pg=team&fr_id=12069