The paint should not burn off the crossover on the manifold with the heads filled with aluminum. The manifold is only going to get up to the temperature of the engine when it's heat soaked, maybe a couple hundred degrees or so. The paint burns off because exhaust gases are over 1000 degrees.
Never had any sign of paint burning on my intake with filled crossovers.
__________________
----------------------------
'72 Formula 400 Lucerne Blue, Blue Deluxe interior - My first car!
'73 Firebird 350/4-speed Black on Black, mix & match.
|