TexasBronco said:
Well if you are all into major mods why not mount the engine back futher, or even backwards in the frame.
There's just not enough space to move it as far as it needs to go without getting into the firewall, and making it so that it's a huge pain to work on.
Mog portals are pretty bitchin. They weigh just a little more than a D60, but the killer is that the pinion is so damn long. From the yoke surface, to the rear of the diff, is about twice as long as a 9". You have to make a tall rig, and move the front axle way the hell forward to clear the oilpan. The upside to this is, since you're adding unsprung weight, it'll lower your COG, and in some instances make your rig even more stable than it was with stock type suspension.
There's a guy here in DFW that put Mog 404's on his Bronc, and stretched his wheelbase to 100". He moved the front forward a bit, and the rear back a lot. You can forget about keeping any of the factory suspension goodies under your rig if you decide to do this. 404 axles are 7.36:1 pretty commonly (IIRC), so they're geared pretty awesomely, and will twist your leaf springs into modern art. Links are where it's at.
I know of a couple of places making portal 9" axles. Sunray makes them, and Bronco Alley has made them as well. There may be others, but I know of those two. They're really bling, and will make you cry when you see the pricetag hanging off of them...