Doing a little at a time with my gt40 head/intake swap. Need some ideas on what is going on here... 1995 gts original 5.0 never opened up 165K miles When I bought it noticed upon hard acceleration (2500rpm and above) a light blueish/brownish/whitish smoke from tailpipe. I wasn't too worried as It runs good. changed o2 sensors no change did tune up #7 cylinder plug approaching foul changed plugs wires etc still blows smoke still runs good, idles good, etc seems to use a little more oil than my last 5.0 So I don't worry about it hoping it is a valve seal issue that will be solved when I put on my newly rebuilt gt40 heads. So I pop the driver-side head today and this is what I find... Still see some cross hatching in the cyls # 7 piston is clean (?) other pistons are not (expected this) other exhaust valves are white (expected this) #7 is not (?) Kinda thought I would see carbon build up on # 7 more than the others Here are the pics... So what is the deal here?