They are they weld in type, can't anyone who knows how to weld put them on or is there something tricky to the job?

 

Eeeeeeasy. You just remove the control arm bolt, put the rear end of the SFC in place and put the bolt through. Tack the front end in place, then weld it up. On the passenger side you'll have to slide it between the cat and floorpan first, but other than that, it's a breeze.

If you want to know about the welds in particular, they're solid welds in the front and back, and stitch welds along the rocker panel. Only trick is to hammer the rocker panel against the SFC before welding.

 

Make sure you've got your pinion angel before you weld

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49 year old kid in an 538 hp 415 84 Camaro

 

What's that have to do with it...? The control arms don't control the pinion angle. They control the thrust angle.