cm 870 top end rework.

[un_yun]

I am currently reworking the top end on my 870. exhaust valves on 2,4,5 were dumping oil. Also inj cups on 2,3,5 where looking a little cruddy. A lot of carbon looking stuff built up in them. So a new reman head is coming(cummins said they no longer offer new)The liner height has come in good @ .22 mm or .010 in. cross hatching looks all most like a new liner. So I am going to leave them in. Cams are ok, a little varnish. But they pass inspection. I am going to roll new rods and mains in the bottom end. Is there anything in here I need to check, change, or alter while I'm in here? Oh, truck has 650,000 ish miles. thanks!!