I agree, Most over carb there mild SBs & will contest its the best, especially when running square bore carbs, the only execption is the TQ, even though it might flow 800 cfm your not useing all of it, the signal on a spreadbore is much better at lower RPMs then a larger squarebore like a 750, Any mild SB will run great with a 650-670 cfm & a dual plane.
