FWIW...my 572 hemi has had the stock style spring setup on it since I built it in 2006. I will be changing to the clamps at the next freshen up b/c I'm curious if they'll help w/ valveguide wear.

You can see my setup here...my daughter was "helping".

Amelia lashing valves.jpeg
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