Stock intake vs performer?

Intake Manifold-------------------------------- Port Size---------- Carburetor Height

Edelbrock Performer #2176 ....................... .97" x 1.95"............ 4.63"

Edelbrock #LD-4B ..................................... 1.05" x 1.95" ........... 4.90"

Edelbrock Torker 340 ............................... 1.01" x 2.10 ............. 4.90"

Edelbrock Performer RPM #7176 .............. 1.01" x 2.17" ........... 5.35"

1971 '340' Cast Iron #3512100 ................ 1.08" x 2.17" ........... 5.00"

Edelbrock Performer Air-Gap #7576 ......... .98" x 2.16" ............. 5.35"

Edelbrock Torker II #5076 ....................... 1.00" x 2.17" ........... 5.72"

Edelbrock #LD-340 ................................... 1.08" x 2.17" ........... 5.30"

Edelbrock Tarantula #TM-5 ...................... 1.06" x 2.17" ........... 5.73"

Edelbrock Victor #2915 ............................ 1.08" x 2.17" ........... 4.93"