I'm running these C-7197 blow-down breathers from Good Vibrations Motorsports. See: https://goodvibesracing.com/Burndown_Tubes.htm#1.25

They are taller than I expected. I connected some high-temp reinforced clear tubing with Oetiker Clamps to the outlets and ran both tubes to a Moroso air/oil separator.

Works for me ....

C-7197.gif
1972 Pro-Street 'Cuda, 500" Eagle stoker B Block, Eddy RPM heads, Victor Manifold, 850 Mighty Demon, Hemi 4 Speed, Dana 60 w/4.88 gears - Built by Hansen Racing Middlesex - NJ