BMW 2002dcoe jetting problems wont pull to 7000

need to solve my problem.car doesn't pull to 7000rpms.have no misfire. 2000cc motor 45dcoes 15/8" header stock exhaust from collector back.290 schrick 9.5:1 cr fully ported head msd ignition 46x38 valves.Specs for carbs are as follows. 36mm venturies,f16 emulsions,55 idle,45 pumpjets 50 bowl jet fuel pressure 4.5 at idle and drops to 3.5 when running 32 degrees total advance. Car pulls strong to about 6000 only Ive been teched out by a guy named steve at top end performance and he said that is what he runs and it pulls to 8000 no problem. anybody out there know what is up by personal experience I bought several items off the guy but every thing seems to not work and the guy keeps selling me overpriced stuff

Does is just lag after 6000 RPMs? Or will it not rev past like 6500 or so?

If the latter described is happening, it may be a vacuum leak.
A friend's MR2 did that, I could rev it to 6500 then it would refuse to rev past that, after fixing the vacuum line, it would rev happily to 7500 with no sweat.

Are you getting full throttle? Check the linkage.