55.2-59 1955 Chevy Cameo Chassis Swap

[case.unfried]

I have a 1955 Cameo that i inherited after my grandfather passed away that i just recently started working on. The problem I've run into at the moment is that i don't know what chassis he put it on. I do know it's an 80's caprice, but hammering down the year has become the challenge. Is there anyway to identify the year based off the frame? Also, the engine isn't original to the chassis either. I'm having issues upgrading because i don't know what year to order parts for. If anyone has any input, i'd greatly appreciate it!