Seems like some people go to junkyards and buy parts that others just discard. I know lowriders seek out low ratio rear ends for our cars when we put 13's on them. Tubular a-arms are not generally used in lowriding but buying a set of stocks from the junkyard and welding ¼" steel to them is common practice. I had a guy offer me a V-8 for my 3.8 so he could make the front of his car lighter to hop it higher. Stock spindles and rear trailing arms are replaced with Caprice spindles and tubular adjustable trailing arms.