First off, what is the height of a stock 2v 351c intake manifold? Second, If you were to choose a replacement to get better street performance what model whould you choose? I'm looking at the Edelbrock Performer of the X-Celerator. The Edelbrock is dual plane and has a power band of idle to 5500, the Weiand is single plane and has a power band of 1500-5800. Once I can raise the couple grand it will take I'm having a shop near my house install a new reciprocating assembly and a new roller valve train but will probobly stick with the 2v heads. Which would the Cleveland people here use?