Yeah I just finished puttin the b18a in my 88si and the engine turns but doesnt crank and there isnt any spark whatsoever and everything is hooked up I have no idea what it could be

 

all ground wires hooked up? (ie the thermostat ground?)

 

assuming ur dizzy was good before the swap, have u hooked all the grounds up, make sure the plugs on dizzy are plugged in all the way, have u checked to see if no spark,(taken spark plugs out and attached them to wires and tried cranking it and having someone watch them to see if it is firing?) If they are firing and ur not firing up check to see if u have fuel pressure, if no fuel pressure check to see if any fuses blown...hope that helps out just check thru ur wiring good 9 out of 10 times that is the problem..