As far as i know, the dual plane is the only one that will clear a stock hood on most 68-74 b bodies if thats the car you are asking about. How much horsepower and torque are you looking for? Because some guys on here , including myself with help from Dwayne Porter are making 600+ horsepower and 630+ ft lb torque with their dual plane. It can be pretty beastly with minimal mods. No experience with the trick flow to add anything.