Sloan, I don't mean to be a pest but your questions don't really make any sense. The sort of gears we have in our rigs have absolutely nothing to do with whether or not you swap to a 350. What are you <IMG SRC="smilies/smokin.gif" border="0"> son?
To respond to what I think is your question, my FJ40 with 35" tires and a Vortec 350 has an NV4500, 3-speed TLC transfer case and 4.11 R&P gears. This combination provides a pretty good compromise for trail, street and freeway driving. The moderately low 1st gear (5.61)of the NV4500 and the above configuration results in a crawl ratio of 53:1. The low-end torque of the Vortec does pretty well on most trails with this drivetrain. It is really great on the freeway with 35" tires because the overdrive of the NV4500. I cruise at 60 mph and 1700 rpm. And yes, the older I get the slower I go. <IMG SRC="smilies/frown.gif" border="0">
I think you also asked how you can run 4.11s and also lower the gearing. The archives are full of possibilities for doing this, and they accurately describe the pros, cons, tradeoffs and costs. With enough money or a good machine shop you can do just about anything these days. For example, my current project(FJ45 LWB frame shortened to 106"WB ) has a drivetrain consisting of a 350 Vortec, SM465, NP203, NP205 and 35-spline Dana 60HD axles with 5.89 gears that produce a crawl ratio of 154:1. There are currently lots of potential drivetrain combinations ranging from stock gearing of about 30:1 to super crawler ratios in excess of 300:1. You need to decide what works best for you.