Went to track sunday discovered problem

[Robert_5_liter]

I took my 95 GT to the track sunday and met the previous owner, The guy said he put a B 303 cam in it it went 14.28@94 mph with a 2.14 60 ft but will not make any power past 4500 RPM.
I go through the traps at 5200 RPM in 4th gear and the car is on its face will my E303 help that problem??.
Now my other big problem I am getting a vibration from 65+ mph and a squealing noise from the trans in 5th gear only when i run it hard it squeals. What T-5 will fit to replace this one are they all the same???
These are my mods 4.10 gears, Ram air, B-303 cem soon to be replaced with E-303, underdrives, MSD distributor, Hypertech chip,BBK shorty Headers,BBK offroad H pipe,Flowmaster 2 chamber exhaust sys.