Another problem shows up because of this dilemma:
All manufacturers of street rod parts are not as clever as others.

But if they use lots of advertising money in all the magazines, which of the magazines dare to write someting negative about the manefacturer?
Can we actually trust the "how to section" if the rest of the magazine is filled up with ads from the same manufacturer?

Personally I trust friends and forums like this much more, even if most of us are not professionals.