440 IC parts that will fit on a 420C

[BLS]

I'm looking at buying a 440 IC for a parts machine for my 420C (the 440 does not run, engine is frozen). Can someone tell me what parts will swap directly from the 440 to my 420? I'm mostly conserned with the transmission, final drives, sprockets & tracks.
Thank you.

Brian

[Lavoy]

Depends on serial number, but not many tranny parts, or none at all, sprockets might, rollers will, rails will, you just have to shorten them.
Lavoy