"Split" the original manifold and run the right kind of heat riser. "Fenton" clones made offshore are worse than useless, and tube steel headers are even worse than Fentons. What kind of race car are you building?
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!