Here is a Homelite 7-29 that I restored for a customer. As you can see it was in bad shape and not running.
About the only things that was useable was the engine, starter cover, sprocket & air cleaner, everything else was either
cracked, welded on or striped out. It took parts from about 3 different saws to come up with enough good parts.
BEFORE

AFTER

CLICK HERE FOR VIDEO

Here is another angle of un-restored saw