took my 90 lx to the track on the weekend, when i tried to shift into 2nd at anything over 4000 rpms it wouldnt go in, i figure its the syncros, anyone else have any ideas? its a stock t-5, the car has a cobra intake, gt-40 heads, b 303 cam, 24# inj, 73mm maf, 65mm tb and long tubes, soon to...