2002 frame question

[bighead]

My 02 2500 HD 4x4 crew swb Duramax was hit in the left front a couple weeks ago and left me with a bent frame and cracked front diff. I’ve located a frame for a 05 ext cab 4x4 lwb that has the front diff in it for cheap. My question is concerning the way GM built the frames. I know there is a junction where a front and rear section are welded together. Can I use the front section of the ext cab lwb to replace the front section of the crew cab swb? Thanks for your help!