I updated that post mentioning one person in particular with a 340 that went faster with a single plane to an air gap. 11:1+ with 4.30s and a four speed in a Duster.
Yeah racing no doubt which one. I was just thinking at what point is the juice worth the squeeze to make the switch on a street car that doesn't see the track often.
Also no doubt if one pays the money to have heads ported one should go with the single plane and have PBR work it over.
Guess it largely depends on what someone calls a street daily driver cam. Lets say duration of 230@ .050 and .550 lift. Wild *** guess- run the one you have as there may not be enough difference to change.
Of course if you have to buy one, then buy the one that allows for the inevitable tweek the engine for more horsepower creep.