[PontiacHO]

You all have shared advise for my 1968 Firebird cam swap and heads rebuilt. It’s been 15 years since my last engine job and in my mid sixties now so memory and strength has faded some….
Swapped a rough idle performance cam for a stock “066” cam to include Hy-lift Johnson lifters, rebuilt the heads with new valves, springs, and milled .020, using all Felpro gaskets throughout.
Set out today to perform the break in. It fired off amazingly fast and I brought it up to around 2,500 RPMs and held there for several minutes. Immediately there was a lot of smoke from both exhaust pipes.
Initially I’m thinking that’s the oils etc. from the machine shop and-or the coolant that drained into both head pipes when the heads were removed.
I ran it for maybe 3 minutes and the smoke didn’t clear so I aborted the attempt.
I pulled all the spark plugs and they all were dry. No dampness.
Would antifreeze that collected in the head pipes from the head removal create this smoke?
This happened about the time all the kids were home from school and I didn’t want to cause any parental concerns in the neighborhood. The wind unfortunately was blowing directly towards my house and I didn’t want smoke in the eve vents.

Mind spinning…….