Porterbuilt tubular a arms

[sduckworth13]

How does the dropmember version vary from stock crossmember version of tubular A arms? I thought they were the same until I looked at the item description for the Porterbuilt A arms on the Porterbuilt site and it mentions they can be built for a dropmember or stock crossmember. The reason I ask is because I picked up a pair with a stage 1 kit from a guy off Arizona craigslist and I never asked which setup they are for. http://www.porterbuiltfabrication.com/?p=119

Thanks,
Scott
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