I have a Turbo Action pro brake in my 727. It has no LBA and doesn't require you to push the button for reverse.
I think the TA is one of, if not the only pro brake that doesn't require the button to be pushed for reverse.

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