aftermarket suspension and crossmembers

where would i find 67-72 aftermarket crossmembers, arms, and all that shizzle?

i seen it advertised... i think in the back of a streettrucks magazine...

i'm planning on gettin a 1970 C-10 longbed.i got a lot of questions, most have been answered but not to my liking. like shortening the frame to accept a shortbed, bagging one and wats needed, and simple stuff like that...

any help would be appreciated...

Check out www.classicperform.com and www.performanceonline.com. They both sell a variety of parts for c10s.