I think Rhoads are louder in a big block Chrysler, my buddy had them in a 440 Six Pack 4-speed GTX, they worked great but they hated the rattle so they pulled them....but did perform well.....like I said, they are quiet in my 340 :D
Yes they work..
Tried Crane bleed downs on a old school 79-80 era grind Comp Cams Stage 3 hydraulic can (312 advertise/[email protected]) . Failed on my part, miss that camshaft. The Rhoads have worked better,for me.