Don't know how much of my experience will apply but I used a 74 Camaro. Bought a complete car from a junk yard so used all of the running gear and suspension.
The 49 frame was narrower than the clip so needed to heat it and bend it out. The Camaro clip was wider so it needed to be narrowed. No Limit Eng has a dvd on this.
I installed polyurethane bushings throughout the front end. I have had 2 different shop owners test drive my truck after doing work on it. They both told me it was one of the nicest driving trucks they had ever seen.
Hope that helps.
