parts interchangeability, '90 K-5 to '79 C-10

[RockHQ]

Okay i know this topic must've been brought up by someone before, but i'll ask again.
1.
-Will the doors off of my '90 K-5 Blazer fit on the '79 C-10 i just bought? I'm asking because the blazer will be made a full trail vehicle so appearance is of no concern, and the doors on it are perfect, whilst the C-10's doors have been butchered by a PO in order to install 6x9 speakers. It looks as if though they will fit, but i need to be sure before i take either one apart.

2. The blazer has a tilt steering column, whilst the C-10 hasn't. Can i just replace the '79 non-tilt version with the one from the blazer?

Thanks in advance,
-Axle