I wish I had done the 865 high compression kit when I had the cam replaced but I was trying to keep th total cost down. So I think it will all work out for you despite having to spend more money thay you originally planned. Once you get it all back together I think it's gonna be a pretty strong motor. If you later decide to go big bore, it will be stronger still.

I'm still real happy with the 813 cams, exactly what the 865 motors need to produce good power.