It's a great engine. Only thing is particularly at altitude it is a dog.. One of my best friends has one in a BJ42... Even with the turbo it is a still a slight dog.. I drove one that Mark Ritchie (old school Canadian cruiserhead had) and couldn't believe the power he had. Also using a cheap home brew turbo... He pulled the head, ported and polished it himself, and put back on, and simply porting and polishing was night and day. It will still be slightly doggish juiced up versus say a 12H-T, but will still work fine. Without the port and polish it will be really really annoyingly doggish, and will have high EGT's when you turn up the fuel to where it should be. It will cruise fine on the flats but will have doggishness in 4WD and the slightest hill will bog it down...
Before CM, I would have told you to stay away, just too doggish. Bottom line is a turbo is required, so factor in that cost (~$1800 usually for a decent kit. Or you can home brew (I have done for less than $400 and it worked great, but is... ...homebrew).
The bolt pattern is more or less the same as the 2F but requires a longer input shaft so requires a B series specific transmission, which are slightly different than the off the shelf stuff. Buying a complete drivetrain is not a bad way to do it at all.. Jeremiah Proffitt is doing just this right now.. So far he dislikes the 3B from a install point a view (the EDIC install is slightly complicated from a diesel install point of view (the 1HZ is one wire like a Cummins setup - 12V on, 12v off turns off. Then alternator and starter and glow and that's it)... Again the head ported and polished goes a long way...
