Go w/ the low profile pan. 1" is huge when it comes to oil pan ground clearance on a street driven car.  I had a deep sump Milodon pan on my Hemi...at the time I built the motor they didn't make a low profile pan for the external p/u systems. After smashing it up a few times I got tired of repairing it. Last year when I freshened it up I bought a new low profile pan for it. Very happy I did. 
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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