153 vs. 168 flywheels, which starter to use

[NitroMike]

Put a new smaller (153) flywheel on my I6 250. I'm trying to find the right starter to bolt on to the "pad" (motor) as opposed to the way the starter bolted on to the bell housing with the 168 flywheel. My very helpful NAPA guy is having trouble figuring out which one (which application)to sell me. I'd like to avoid buying one of the hi-tork mini starters if at all possible.

Any suggestions on which application to use?

Thanks!