Cold start smoke

Ls10

New member
Bought a ty with a couple broken ring lands,rebuilt the motor. it has a turbo tweak chip,60# injectors,fmic,holset hx35,ignition upgrades,when it's warmed up its perfect,even after I shut it off and restart no smoke. When I start it in the am,after about 45 seconds I get white/grey smoke out the exhaust, it has atr headers that has a tiny leak at the crossover clamp and it looks like I get a couple drips of oil out of it. As soon as I get down the St it clears up. Runs perfect. I didnt do the valve seals because the previous owner said he did them not long ago.....i know I shouldn't have listened to him and should have just done them,but i was in a rush to get it done.......does that sound like valve seals? Or do I have something else going on?
 
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