Another 700r4 conversion question

[TN4X4]

I'm still somewhat of a newby here so please forgive the repeat of this question. I drive about 50 miles (interstate) one way to work. My truck has a 4.11 rearend and 33" tires. Obiviously, this combo and a TH350 doesn't do well. I've researched these forums for quite some time and I haven't found anyone that has layed out in simple terms how to converted a '67-'72 K20 from a TH350 to a 700R4. I'm sure I've overlooked it. I'm pretty familiar with the 700, but not with these trucks, especially the 4wd's. For instance, I'm not sure what kind of transfer case I've got (np205?)and how/if the 700 would bolt to it (shaft size and spline count differences). Any advice and direction would be a huge help (FAQ maybe). I'm aware that the 700 is longer so I'll have the move the motor forward or the tranny mount back (which is what I'll be doing) and shorten the drive shaft. It can't be that simple, right? Thanks.