Rear camber arm question

Need help on these.I'm thinking or buying the S13/300ZX rucas or the S14 ones that go around the dampers.My question is what material would be best?
 
I found one made out of Carbon Steel and another of Iron what you recommend?It's for a Heavy car the G50 thanks.

uhhh... how bout drop the car and get wheels first? :dunno:

oh... steel btw.

I'm gonna drop the car after New Years because I get xmas break so i can't work at the school shop to install the parts I'm getting next week.I'm gonna replace my sparks and gasket it takes 8hrs supposely so no time for that until 09. 

I want to get the tension rod and arms before rims since I cant afford them yet. Dont wanna mess up or go too fast then get some cheap ones feel me?I'm trying to do it right.I was looking into SSR or Works.

Im still looking in those tail lights if it was you who wanted them if i was correct.

But yeah so you recommend steel?The rucas are iron the one the goes around are carbon steel.Im buying them this friday.

dude
 i have a full set of arms off my cedric for 300 bucks

your email doesnt work btw.