Hi guys, where can i find the plans for the 1980s tardis as this is the one im going to build.
Depends which box from the 1980s you are referring to:
The Newbery was used in various guises (with the addition of a stepped roof/replacement signage and even a new set of wooden doors) into Peter Davison's first season. If this is the box you want, the plans for it have been posted by Markofrani (see above).
The stepped roof which the Newbery Box acquired was drawn from the same mould as the Yardley-Jones Box (which replaced the Newbery version in Tom Baker's final season).
The plans for the various Yardley-Jones boxes are available in the reference section.
Note, there were three versions of the Yardley-Jones box;
1. The first box in was in use for seasons 18 and 19 (altered Newbery Box appears in Logopolis, Castrovalva & Black Orchid).
2. The second box which debuted at the start of season 20. (This second box may have re-used parts salvaged from from the first version.)
3. The third box which was made for season 21's "Planet of Fire".
The second and third Yardley-Jones boxes were used interchangeably (and their parts occasionally swapped between them) throughout the remainder of classic Doctor Who.
I hope this helps.