Do 435 was a long span version for which the Do 335 V4 served as a prototype. A number of variants were proposed on 12 September 1944 according to original German sources.

A-1 and A-2: Bombers.
B-1 to B-3: Night/Bad Weather fighter
C-1 and C-2: Reconnaissance
D-1 and D-2: Führungsflugzeug

All variants with DB603L engines.

According to British Intelligence document:

It was a modified Do 335 version intended as a night fighter. Crew of two seated syde-by-side in pressurized cockpit. Radar equipment. Long-span wooden panels. Jumo 222 engines.
Type 2-seat  night fighter
Engine 2 DB 603L
Dimensions Length  , height  ,  span  , wing area   ,
Weights Empty , loaded  , max. take off weight  
Performance Max.. speed  , cruising speed  , range , endurance  , service ceiling   , climb
Armament