A833 for 72 Charger

Need some tech info and some performance advice. I'm trying to find an A833 4 speed for my 72 charger. It's going behind a 400 that I hope will be around 450-500hp. I know I can buy the exact setup from Brewers but I'd like to try and save some $$$. That being said, I know the differnce between saving money and be a cheapa$$. I want the setup to be right and last for the long hull. I've found an 23 spline OD trans for a nice price with an iron case, long tail house with dual mounts, and 5.125 bearing retainer. Can I make this work properly with out chopping everything up and staying cost conscious? Will the OD gears/shafts hold up for the long hull? Pretty sure this is a late 70s truck trans. Anything I need to know about making this work? Bell housing issues? If this won't work what are my other options besides finding the exact 70+ trans with long tail. Thanks for your help.

Friend of mine installed one in a 70 cuda with a HP 440. No problems with HP or Torque. The gears ratio drops result in a reduction in acceleration. The front yoke will required modification to fit the big block bell housing. Remove and take it to a machine shop for resizing. Good luck

Thanks man. As for the acceleration, how bad is it? Would a specific rear ratio help? It's a street car but I'd like to be able to smoke some kids in their daddy's ride.

I've got a 833 O/D behind a 69 440.

No issues with holding the power.

I'm not sure what the final drive is but if you do "the math", you'll see that anything over 3.55 (and IMO that's pushing it) basically renders first gear unusable. Example 3.55x3.09= 10.96. For reference a more "normal" first ratio of 2.66 with a 4.10 rear is only 10.90!

So using that truck O/D and 3.55 is lake having a 4.10 while you're in first. Sounds good=====however the real issue is the "drop" as stated above, which is close to 900 RPM IIRC going from 1st to second.

I spend a LOT of time in second while driving that truck, however, at cruising speeds on local 50-60 MPH roads, I'm almost idling in 4th (O/D) at about 1200 RPM.

For the car, my plan is to try a 2.94 and a 3.23 to see if I can find a good balance.

Be aware that the rear shifter mount on a lot of truck units is not drilled out or tapped.

I'm building another setup for one of my 72/73 cars. I thought I'd have to drill and tap, but after doing one hole, discovered that the bench seat configuration I'm using uses the front mount. The drilling wasn't that difficult (aluminum) but centering and leveling, not to mention supporting the trans near the drill press was interesting.

I did have one on my roadrunner with a 440 with no issues. However, it switched mine to a standard non o/d 833 because of two reasons. One, I am not driving my car on the highway very much and really didn't use the o/d gear. Second, I found that while making a lazy turn, that the 1 to 1 gear was a bit too high while down shifting into 2nd was too low. I really wanted a 3rd gear. I am really enjoying the car a lot more since I made the switch. Just food for thought.