[JohnT]

I understand the the 400 ci Chev Small block was externally Balanced (Flex Plate & Crank Damper) If that is true, Does the conversion to Manual Transmission require Special Flywheel unique to this Engine??

[Phat]

Yes I think if you look in the speedway cataloge they have a counter weight that bolts to they crank before you install the flywheel. It a very thin piece of plate that balances it.(i personal would have the ,motor balaced if it was apart) But they do work. About 20-30 bucks.

[Dbodily]

Summit also has a flywheel to match a 400 sb to manual tranny.

[destroked]

northern auto parts sell the cheapest fly wheel for 400 chevy i know of

[chevyelc81]

yes, all of you are right. I did the same thing for my 69 camaro. I bought an original automatic small block 400 and needed to change the flywheel. You have to be careful though, I ran into some problems with the flywheel size. In my application, I needed a 153 tooth flywheel. I bought a 168 tooth flywheel with out knowing and it wouldn't fit in the bell housing of my munci M-22 transmission <img src="graemlins/crash.gif" border="0" alt="[crash]" /> . The only place I found a 153 tooth for the 400 was in jegs. It was a good 300 dollars, but it works great, Just letting you know, your application might be different. Good Luck!