i have just done a PI head swap and the motor turns over but wont start and i cant figure out why. i know the timing is right and i can feel the compression in the start but it just wont fire up...any ideas?

 

well after me and jaso0on messed with it, we realized it had no fuel, after playing with my nitrous fuel T for a few, out came the fuel, now the next problem is theres no spark, but the coilpacks worked just fine before the headswap.. any imput there?