How fast have you gone with exhaust manifolds?

XE284 comp cams cam, .030 360 with factory dished pistons, Edlebrock Torquer II intake, a 850 holley carb that flows 1130 cfm's, factory iron heads that were bowl cut and blended with a gasket match with 1.88/1.60 stock valves. Fully adjustable valve train with 3/8 chrome moly pushrods, timing set at 35* total @ 2500 rpms.