To tell you the truth I'm not sure on the year. It's the square body style.  But my paper work on it says 93. I though that a 93 was the rounder style
 it has the vortech in it. It's in my tow yard and I havnt really started to mess with it yet. Havnt even started the engine yet.  And as far as the adapter go.  It's a marlin adapter. I talked to freds40 about it. Just waiting to see what he says.  If it won't work on the 420 then I'm just going to use the 465.  The 420 adapter is $500.   And I'm going to get both trannys for less then that plus an adapter.  Also been tossing around the idea of going to a 203/205 double.  Face it the toy cases will be my weak link.  But the odds
of that are slim.