340 Intake manifold recommendations

Bewy said
Because intakes perform 'flawlessly' does not mean it is best for the application....
The Perf & stock intakes work best in the idle to 5500 rpm range.
The RPM has a range of 1500-6500 rpm.
The OP needs to decide which one best suits his engine.

And with that in mind…… also, since you love to match the RPM range of products up so much…. The cam card specs below!