The bolt-ons from Glasstek are heavy, but very rigid.
It does not hit the windshield at all.

On some body styles, it's impossible to get the scoop real close to the windshield and have the hood be a bolt-on using factory hinges.

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