I'm not sure if this helps with the questions you're asking, but there's a good writeup on an ARB install on an '04 Tacoma on the Expeditions West website here
Ryan
2008 Tacoma
1968 Camaro
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them" - Thomas Jefferson
"We all dream of a world filled with sunshine, peace, and happiness. The problem is that half the people think this sounds like a wonderful place to live...while the other half think it sounds like a wonderful place to pillage."