New guy with some questions about my 68 C10

[sixD8]

Hello everybody! What a great site! Looks like this is the place for all the info I need. I just recently purchased a 68 C10 Long bed for $1,200! It's a beater but only rust is the rockers and the rear cab corners. I will post some pics soon. I have a couple of questions....

1. What are the stock wheel size for this year and model? And can I use
different size wheels as long as they are 6 lug?

2. The gas tank...right behind the seat. Do most of you remove that and
put one under the truck? Or is it okay back there?

3. Brakes....I have drums all the way around...should I get disks...or are
the drums ok?


Thanks