What flywheel are you using? The teeth on mine get hung up on the flywheel and won't disengage. Mine is a Auto Zone starter with 11 teeth. Part # DL9990s,I have a TCI 168 tooth flywheel for the 400 sbc. The starter has a offset bolt pattern.scuba_steve's_bu said:we just changed the starter in my car. it went out between the 1st and 2nd round last week. we put one in from a 97-99 vortec 350 chevy pick up (napa part # 4n-5110). went right in no problems, lots of room and no shims!! reached in turned the key and sweet it worked. we did use the stock bolts and had to put 3 small washers between the bottom of the starter and the bolt. my motor is a 400 small block with staggered pattern. sure went in alot easier than it came out.