Yes, I bought an assorted pack of resistors at RadioShack for only a few bucks. They are all color-coded tho, they have no numbers on them but rather they have several bands in different color, it will tell you on the back of the package how to decode them tho, and you can look it up online as well.

As for the trans temperature, yah, she'll tend to run hotter - the converter will have about 400-500 rpms slip in it under load, and about 150-200 rpms while just cruising along. I use my A/C condenser as a trans cooler, plumbed after the factory heat exchanger in the radiator. In your case since you'll be running unlocked all the time, I suggest you install another cooler in there somewhere...