4 Speed w/ Overdrive Any Good?

matthon, I have heard testimonies both ways on the OD 4 speed, some people swear they wont hold up to a big block, but I have personally seen one behind a hot 440 and it held up for quite a while. I would say if you aren't running slicks and it is just regular cruising you may be ok with it. It is a direct bolt in, but you will need an OD bellhousing and I have not seen one of those for a big block. You could have a machine shop machine the bellhousing so it will accept the bigger OD input shaft housing. I have seen this done also and it works fine if it is done right. Lastly, I would NEVER pay $650 for one, I have seen them on this site for as low as $150 recently. Good luck with it