94 ram 1500 harmonic balancer? ???
 

So ive got a 94 ram 1500 with I thought the 5.9 v8. Went to replace the harmonic balancer pulley and the one the parts store gave me (the only one they show for this truck) was the wrong one. It only has the one big bolt in the middle to hold it on. The one I have has six smaller bolts and the big center bolt... just spent an hour at the parts store tryin to figure it out and cant.. any ideas???? Picture is of the one I pulled off the truck