My cost on Edelbrocks is about $1600 depending on which part # you get, they need about $250 prep work before instillation unless you like to gamble on them being set up correctly...less than 50% are from my experience. Even with the various "discounts" that surface form time to time, 30% off $1800 is still $1200 and you get the $600 discount in the form of a gift certificate, so its not really paying $1200 cash. If you throw in the prep/check out cost of $250(average) and add it to the additional $250 over EQ you are looking at $1100 more but you get to pick out $600 in parts from AZ or whoever has coupon. Doesnt even sound comparable to me. The "power potential" of Eds over EQ's is in the range of 40HP but that is only with massive cnc porting that would do OP no good. The EQ's will easily make 400+HP OOTB and I have seen 575+ with EQ, possibly 600, and that was on a stroked 5.2! The OP will not see 400 HP with the cam he has but should be a strong 350+ HP. The 1.6 ratio rockers on the Magnum will help the 268.