A code on the door pillar plate will tell what plant assembled it.

Original color will take some detective work. If it doesn't have a deluxe heater there will be a plate on the firewall that may have original color under it. If it does have deluxe heater there is a seal around the blower motor. You may need to pull the voltage regulator and look under it. If there is an undercoating under the fenders the original color may be on the cab under it.

"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.