(I hope you guys don't mind questions that have answers that are probably obvious to people more knowledgable about cars than me.)

In perusing the FF order page for the '33 I see that a "four link" rear suspension is standard, and a "three link" is described as an upgrade that costs $599 more. I have no idea what a four link, three link (or two, one, or no link) suspension is. Can someone explain them in fairly simple terms?

Why is the three link better? Is it an advantage on the street or the track—or both? What are its disadvantages compared to the four link?

I want to build the best '33 for me that I can, but I have no basis for choosing one or the other, other than that the three link is an "upgrade".

My '33 would be built with full fenders, the hard top, and would go out for autocross and track lapping days (but no wheel to wheel racing) and it must be well-mannered enough on the street that my girlfriend (and wife of 27 years) will be happy to go for rides with me.

Three links or four?

Thanks in advance for replies.