ORIGINAL: t-34
hey there Brew--- I have pushed 55's to there limit and there is no way you are going to get a decent R.P.M with a 10 X10 , if your lucky 10,500 to 11,500 . A 10 x9 is the max for that engine and I have tried alot of differnt exhaust systems and fuel combos to back up my position .
Joe, you may have "fell off the pipe" make the header longer and try the 10X10 again.