When you say use the one that is close to the length of my main, is that the only part of the chevy spring to be used?
For 1-2" of lift all you should need to use is the Chevy leaf that is as close to the same length as your Toyota main, the other leaves you can toss or keep some of the longer ones for later use. Since I have a shell and custom carpet kit/built in tool box etc., I have used 2 from the chevy pack for about an additional 700lbs of carrying capacity
Now does that bolt in directly under the main toyota spring?
Yes, right between the Toyota main and the next leaf down.
If so, do I toss the rest of those springs as well.
No, you need to keep the rest of your Toyota springs to complete the spring pack.
So would i wind up with one toyota leaf and one chevy, or all the toyota leafs with on chevy under the main?
Exactly.
As for the new pins and nuts, you want me to get new ones for the chevy springs or toyotas?
Spring center pins are/should be the same for all light trucks, just ask the counter person for spring bolts for your year Toyota.
I am guessing I need those because they are longer for when I bolt the new setup together?
Yes, the new spring center bolts should be a couple of inches longer than the stock ones. You might have enough room on the stock one for one Chevy leaf, but not for 2.
You will also need a good C-clamp to hold the springs together when you seperate the leaf packs, and when you go to put them back together. The spring center bolt is smooth on all sides, so you can't get a wrench on it when you go to tigjhten the leaves back up. You use the C-clamp to compress the springs together then tighten the nut by hand. Don't cut the excess off of the center bolts yet. Once you have the new packs back together and on the truck, if the ride hieght is where you want it, you can go ahead and cut off the excess and reinstall the bump stop.
Your U-bolts should be long enough, most oem's have 1-2" below the nuts, check to make sure you don't need new ones before you start.