How many model years are in your car?

So this could be fun. As we all experienced buying the older cars and parts off other cars for it, how many model years can you prove are in your car. Or what years do you have to look up just to get certain replacement parts?

My car: 1972 Plymouth Duster

1967 Dart power brake booster
1968 B Body 8-3/4
1969 casting 340
1970 hood and trunk lid
1971 production date
1972 model year
1973 disc brake swap
Volare front brake hoses