Get a ford taurus or t-bird fan from the junk yard for 25.00. A two speed fan with a build in shroud. Low speed works about as good a high speed. These fans work well on a zcar with a v8 and are cheap, but require lot of power (thick wires and big relays).
Check your engine ID numbers on the block under the alternator.
Pull the valve covers and check the casing numbers.
Look at the block casting numbers at the rear of the block.