replacing engine: what else likes to rust & rot, while I've got it pulled?

[johnunit]

Removing the bumps was an old trick from before the availability of aftermarket heads. It does make a difference, just smooth them out, but don't get crazy. Also gasket match the exhaust port, but leave the intake ports alone & you will feel the difference in the Butt Dyno and see it in your timeslips...

I know that it's the most basic and significant step in porting a smog head, I'm just wondering if it could be done while still actually using the smog passages without it screwing something up somehow.

[1990LTD]

nah I can't see it.