There happens to be a deal on the service manual you need on ebay right now. Usually you have to buy the '58 manual and the '59 suppliment separately but this guy is selling both for one money and the price right now is way low.
manuals

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.