looking for advice on pop testers...

[lmwatbullrun]

Am restoring a 1985 760 D24T volvo. Just finished changing the cam timing belt and injection pump belt, using suggestions found here; thinking about changing the injectors as they are 25 years old with 150K miles on them and according to the previous owner were never changed. Any suggestions for a pop tester? These injectors are Bosch NA40X; do they have the same threads as the NA34X in the same era M-B diesels?