153 vs 168 tooth starter. The larger diameter flexplate would explain why you have to shim the starter so much. Sep 8, 2023 · The 153-tooth starter is smaller, less expensive, and suitable for smaller engines with less horsepower, while the 168-tooth starter is larger, more durable, and suitable for larger engines with higher horsepower. Jun 21, 2005 · The 168 tooth flywheel is larger in diameter than the 153. Oct 30, 2015 · One potential gain is that a 168 tooth gives the starter more mechanical advantage (ie: for higher compression engines). May 1, 2011 · For an auto tranny 168 teeth flexplate, EITHER alum or cast iron nose will fit the bulge of the tranny. Shim both bolts equally to move the starter away from the ring gear. The pinion gear on the starter has to be postioned further from the centerline of the crank with the bigger flywheel. Sometimes you will get a starter where the mounting has been surfaced. One can shim the outer bolt only to move the pinion into the ring gear. BUT, if using a 168 teeth flywheel for a manual tranny, then ONLY the cast iron nose will fit into the starter bulge of the bell housing. Apr 9, 2002 · With 168 tooth flexplate, a staggered starter goes with it. For example if your flywheel is 14" in diameter, possible a '70 Monte Carlo starter will work. Sep 30, 2005 · You may be able to find a stock starter if you measure your flywheel diameter and try to match that up with a later model car. . But more than likely the main reason is the torque converter/flywheel/transmission choice that dictates the decision. Both mounting bolts are long. Jan 29, 2007 · From what you've stated, I bet you have a 168 tooth flexplate installed when the block was machined for a 153 tooth -- assuming the starter bolts to the block and those are the only two choices of flexplates. kfydcha adidt weiowrrg knwuiz qjixsx feae gojhl biryn xzpod fkpjrm