SPC control arm, Skylark 72

[Macbuick]

Hello,

What do you think about SPC control arms? they are fully adjustable for an easier alignment.
My car is a 72 Skylark with Baer track 13" discs on stock spindles, Hotchkiss sway-bar, 17" ARE Salt Flat...


I think about replacing my stock arms, but i prefer something easily adjustable, the other brands doesn't offer adjustable control arms .
Has anybody tried these arms, are they strong enough for a G-machine or only for 1/4miles, are they reliable?

http://store.summitracing.com/partde...5&autoview=sku

Thanks
David