1997 gtx will not turn over 6500 rpms

[speedin96]

i have cleaned the carbs cleaned the rave valves, all new fuel line with filters it has a 787 motor in it turns around 5000 rpms when wide open the let off the throttle then back to wide open it will jump up to 6000 - 6500 it has 150# of compression in both cyl's what should i look at next. thanks for your help tim

[Technical Support]

Re: 1997 gtx will not turn over 6500 rpms

Check exhaust hoses for damage.