CC 2wd to 4wd

[Mattman2010]

I have ran into some problems with converting my CC C30 dually 2wd to a 3/4 ton 4wd. All of the 4wd parts that I am using are coming off of a 1980 k20, my CC c30 is a 1985 and I know some things are different between the years. None of the k20 spring mounting brackets on the frame swap directly over to the C30, I have had to drill new holes for the swap from the dana 70 to the Corp 14b. I am starting to swap in the front axle and have noticed that none of the bolts line up for the front leaf spring/core support mount. The k20 engine cross member does not fit into the C30 frame rails. Now that you are probably confused with all this rambling, here is my question.

Would it be best if I found a 81 - 87 k20 frame to get parts to convert the c30 to 4wd? Or is my problem that I need to find a K30 cross member to put into my c30? Or am I going to have to go buy some steel and make my own cross member?

Thanks, Matt