My engine locked up I need to rebuild it. Where is there a good deal on a engine rebuild kit?

I don't know the terminology 2 input for a quote on a valve job had timing chain fixed need to make sure valves are working properly

and won't stay up when i pull it up with by hand. clutch won't work at all.

cant find speed sensor

There is a constant, loud ticking noise coming from top end of the motor.

replace fuel pump?

But still key won't start it.

What can I do to fix it?

I have a 1994 Nissan truck and a 1989 Nissan truck both have a 2.4 motor in it. I am wanting to do a engine swap in my 1989 would the motor from the 1994 fit in it. The 1989 is a 4x4 single cab and the 1994 is a 2wd extended cab. Both have 5 speed trannys. Would it be possible to change the motors with out have to mess with the motor mounts?

seconds,turned screw all way back.Light flashes 4 times about every 10 seconds Found that if you turn key on turn screw clockwise while you are waiting 5 seconds light starts flashing 1 2 3 4 5 Then repeats, then if you turn screw back counterclockwise it goes back to 4 flashes every 10 seconds.

no service engine soon light on. it will also start right up again Mileage is suffering too