steering column compatibility

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I recently converted my 1970 C-20 from a manual trans to an automatic and want to install a steering column with shift linkage. I have all the pieces and parts from a 77 C-20 and was wondering if anyone has tackled this project. Both transmissions are th350's and I was planning on wiring the blinkers and using the ignition switch from the 77. Is this more of a headache than it is worth. What are the pros and cons.