HIGHLY unlikely it holds up.
To be honest. I had bought Zybar, as recommended by
@Croatan_Kid, but by the time I got around to doing this the zybar had evaporated, which I didn't find out until 7pm Saturday night after I had already baked and blasted the manifolds. In a pure rage I stormed to Advanced and bought the best VHT exhaust spray paint money can buy.
So no. It will probably last through the initial break in and that's it.
And then! My friendly neighborhood
@amcjeepman slid into my DMs and said there may be an interreference issue with these manifolds because they're '80+ manifolds, not '79 and earlier... soooo may have been for naught.