New Magnum heads for 347 with Flow data

Solid gains for sure.
.1 65....64.....-1
.2 122...130...+8
.3 167...189...+22
.4 194...217...+23
.45 194..214...+20
.5 192 ...212...+20
.6 190 ...212...+22

Looks like a bit too much over hang on the SS in my humble opinion, but I know how the pics can be deceiving vs seeing in person. None the less in the big picture of what the build is targeted for they should rock. Lots of low RPM air speed should make for a very torquey responsive motor.

Thanks for the update. Much appreciated.