Blazer Overdrive 700R4 or 460LE

[mseymour]

Im seeking advice on installing and OD tranny in my 72 blazer. Im currently running a HO350 with carb, TH350 and NP205. Wanting to add an OD and not sure if 700r4 or 460le is the best route? Also looking for simplicity of installation. Ive searched the site and found lots of talk on 700 installs but cant find much for the comparison of the two into my particular applications. And I would prefer to slide the motor forward instead of moving cross members and cutting driveshafts

Any help and advice is much appreciated!