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I have about the same combo 10.5:1 rpm intake 58 chamber heads 750 demon. You should try the extreme 268H or the nitrous extreme 262H they both hit hard and make about the same 390 to 400hp with vortecs your using. I just switched over from a 305H to a 262H and honestly the car drives much smother and has a whole latta bunch torque down low, which makes the car launch harder and feels like I lost no power at all. OH! and no more plug fouls. By the way chevy and HOTROD have been doing a bunch of testing with those heads and the 268H EXTREME @ all times making 390-400hp with those vortecs. P. Hernandez 68 chevelle 355 ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
