OK I NEED SOME SERIOUS HELP ON MY DAILY DRIVER AS MY MAZDA 929 S BROKE DOWN.

I HAVE A 90 CIVIC DX WITH A REBUILT 1.5 DX BLOCK
I DID THE DPFI TO MPFI SWAP OVER (SUCCESS) AND I AM USING A P28 ECU(NO CHIP)MY 1.6 HEAD IS CRACKED.....I HAVE A PO7 VTEC-E HEAD NOW
ITS ON THERE NOW AND I NOW NOTICED I WILL HAVE TO NOTCH THE DIZZY TO FIT
AND FIGURE OUT THE VTEC.BUT NOW I NOTICED THE 1.5 TIMING BELT IS TO BIG.
AND NOW I THINK I NEED TO CONVERT TO A OBD1 HARNESS

QUESTION # 1
WHY IS THIS BELT TO BIG AND WHAT BELT DO I NEED?

QUESTION # 2
WILL I NEED TO DO A HARNESS CONVERSION?

QUESTION # 3
WHAT ABOUT THE DIZZY AND VTEC?

 

So should I use a vx water pump and timing belt?
will it bolt onto the block the same?