Years ago I ran a 440 w/ some severely shaved 915 heads on it. Shaved enough that I had to notch the corners of the intake manifold to clear the china rails on the block.
When I tightened down the intake, it crushed the valley pan down at the corners, but port alignment was still correct.
I didn't use any gaskets on that one...ran it for years w/ no problems.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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