Can't speak for the big cube part of the question, but years ago 2-650's vs a 750 single on a 446cu.in. was worth about 3-4 mph in the 1/4.

I'm tunnel rams on everything now 493 & 528 cu.in.


'86 Maple Grove KOS Mopar low qualifier......true street legal with no power adders.

NOS-used when losing since 1940.