How do longer ball joints affect suspension geometry?

So this is slightly off topic as its for my fiero, but i see some third gen owners have brought up the topic, dunno about fourth gens, and I know this is the place that could answer a suspension question or two with a real answer.

A somewhat popular product for fieros are this guy's extended ball joints for the front that lower it about an 1" (also has a 1/2" version.)

http://rodneydickman.com/catalog/product_i...products_id=158


I'm debating these or lowering springs. Its not a race car, more or less a daily driver.

I'm wondering if these are better, worse, or no different to the suspension geometry and handling characteristics vs 1" drop springs.

Its also got me wondering, if they are better, then am I doing wrong by using lowering springs in my fourth gen?

paranoia.

Any input would be appreciated.

wheel valve stems question

this may be an insanely stupid question, even better that its my first post. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/cool2.gif)


i recently noticed that my regular old rubber valve stems have cracks in them, and im afraid theyre going to, or already are leaking.

im interested in starting autox, or road racing (the course at englishtown.) so id like to get everything in tip top shape.


i found an old thread here mentioning these types of valves:
http://www.jegs.com/i/Mr.%20Gasket/720/1957/10002/-1

are these appropriate for street use? are they overkill? are there any down sides compared to regular all rubber valves?

thanks in advance.