Classic V2 interior swap V5
 

It is possible to swap early classic interiors with later?

I think I'm right in saying V1-V3 shared an interior and V4-V6 shared an interior.

I've got a pretty special V2 but I much prefer the V4-? interior.

Can the dash, instruments, door cards and seats all be swapped over? with respect to AC controls/instrument cluster is the wiring compatible?

Anything can be done but good luck.

Seats can certainly be swapped but not sure about the rest of it, guess you'd need wiring looms as well as the connectors on the dash boards will be different, won't be an easy job, saying that I saw someone on Facebook had swapped a newage dash into a Classic so anything is possible.

It can, hard part will be the dash, i wouldn't bother, will devalue the car long term aswell.