This post highlights the rebuild process of the old 305 in my 1985 Chevy Short-Box, Step-Side Restoration Project.
I'm finally getting some pics taken of my progress (which has been relatively slow as I simply have a ton on the go this summer). This weekend past I finished up the frame restoration. Basically, it involved grinding down, spot blasting, cutting out, repairing and painting of the frame. It's actually done, but I haven't taken pics of the painted frame yet. Here's what I do have;
A bad portion of the frame needed to be repaired. Here, I've ground off the original rivets used to secure the leaf spring supports to the frame -- and pounded them through to remove the supports. The bad section was then cut out with a small cut off wheel in an air grinder.
After welding in the new piece of steel, the welds were ground down to produce a smooth, finished surface (well, better than the rest of the frame anyway!).
The leaf spring supports were then reattached with grade 8 hardware. The key to this was marking the location of the support on the frame before removing it. Of course, I had to do this on the top of the frame as I was cutting out most of the side. I would imagine you'd track poorly if you were to be off much here, which would cause excessive tire wear, among a host of other problems, such as handling.
Last, the frame was ground down with an angle grinder and stone, then with a wire cup brush to remove as much rust as possible. (Yeah, the underside was fun.)
I'll have to take a few more pics and get them posted -- I'll update this as soon as I do.