your cam and heads work together. Too much cam and not enough in the heads defeats the whole point. That's about all I know personaly.
I had a set of heads from EDELBROCK myself and I was not able to find anything out, SO I SENT THEM A EMAIL........got the info I needed.
Give it a try.
I looked up the # you gave in the 2002 parts Catalog and saw no 6160.......sorry.
Licensed CHEVY pilot, Certified car nut.