Engine replacement in Chevy engine

[wny-pat]

is likely approaching the age where the heads need to be rebuilt or it will suffer blowby.

I never forget the reconditioned head that I put on my Cummins 5.9 in the old Foretravel motorhome. Dropped a valve 1200 miles from home and Cummins said that there was no fixing any of it! It was a expensive lesson. Never replace a head on a Cummins diesel unless it is a Cummins certified replacement head!!!