wierd engine problem, if you think you know please help Options

[TrD3sgte94]

ok my celi has been sittin for awhile and i decided to put a new engine in it so i have this new engine and i installed it-swapped all screw in sensors of my old block onto the new one also used my intake maifold & throttle body, i hollowed out the piece under exhaust manifold (its directly under where it bolts to the block and has honeycomb shape), i resurfaced and lightened my own flywheel at work and installed a stage 2 excedy clutch,pressure plate, and release bearing. now that everything is put together i cant get it to completely crank over , it trys but wont do nothing more. i have checked and my fuel pressure is good and im getting fuel to the combustion chamber, i have put it on TDC on the exhaust side and timed it, it gets a yellowish type of spark when i checked (should be blue i thought). so im getting fuel,spark, and its timed right so why wouldn't it start...
i have checked everything from timing,fuel pump,fuel pressure, timing belt, distributor cap & rotor, wrong wires plugged up, relay fuses anyone have any idea what going on?

-wess-

im desperate to get this bad boy on the roads again any help is muchly apreciated