I run a CJ8, that I just finished converting over to a SBC / Turbo 400 Tranny / Advanced Adapter to my Dana 300 T-Case. I elected to stay with the Dana 300 because I wanted to install a Tera Low 4.0:1 gear set. This combination worked out real nice for me, however I have a lot more length to play with. You might want to go with a good 700R4. I believe they are the shortest of the bunch, and if you do your homework and get one of the good ones, it would probably be a sweet set up. One thing I would like to note, is that the turbo 400 pan is also very wide, and can get in the way of your front drive shaft if you're not carefull in your choice of engine location. As far as axles go, I elected to go with Dana 44's front & back. I too read a lot of articles that frowned on using the corporate axles. If you are interested in building up a set, I would guess that the price of a Dana 44 versas a Corporate 12 would be negligible. Either could be shortened to meet your specific needs. Depending on the width you require, you might keep a look out for an older doner Wagoneer that has Dana 44's. Helping some friend do there mods recently, we have been able to find several of them in our local junk yards. Some helpfull hints... MORE puts out a real nice set of SBC Conversion Engine Mounts. Remember that your stock radiator will no longer work for you, the inlet and outlets are on the wrong side for your SBC. Be carefull in your choice / set up for your Power Steering Pump. ?? Your Jeep Gearbox may be "Metric", while your GM Pump may be standard. you will need to either mount in a Jeep pump, or have a custom hose built. Also, think out what you want for your exhaust system. Another change to plan out is for relocating your rear cross member. When you lengthen your Tranny, your stock mount hole may not line up well. Along with that, be ready to shorten your rear driveshaft, and lengthen you front one. Your shifter selection, etc...... Lots of things to take into consideration befor you start... Good luck... Thanx, Jax
CJ8 - Longer Is Better...