The usual stuff:
cut off wheel(big help)
drills
sanders
grinder
rivit gun (pneumatic)
pop rivit ( not my first choice)
welding (I had to out source but I am working on getting a welder)
Imagination
determination
ingenuity
Those last 3 are propably the most important . . .
Alot of people scratched there heads and laughed when I said
I was going to make an Indian beach cruizer . . .