[Mike C]

What size flywheel do you have? If you have 153 tooth wheel, get a starter for a 3.0 mercruiser. The 181 cubic inch Merc is the Old Chevy II 153 ci motor bored and stroked. The Chevy II is 2/3 of a 230/250 six if you weren't familiar with them.

I used a 3.0 gear reduction starter on the 153 ci Postal Jeep motor (used by Kaiser Willys 68-70 in the short nose postal in front of a Powerglide!) I'm R&Ring for a jeep project.