Rear suspension questions for the experienced!

[3100 special]

First, I'm mechanically inclined but, not a mechanic. I can figure out most things by looking how they are assembled but let’s face it, there’s no way to replace the experience that some of you have in the field. Ask me anything about communications equipment or data networking, I’ve got an answer. But suspensions….?!

I’m looking at removing the stock rear out of the 54. I’m leaning towards a Ford 9 inch with disk brakes. The questions:
• What years/ makes are good for the weight of the panel? (without ABS). 1994 Thunderbird?
• What are the advantages/disadvantages to going with a 4 link suspension?

I plan on using the panel mainly for sporting around on the weekends, occasional road trips. I definitely need a rear end that will handle some power as I up the HP on the engine (I plan on starting with around 350-400 HP) and I don’t want to have to go back and start tooling with the rear to handle it. Saying this, what is the average gear ration that will be in the stock rears that you recommend and what does it need to be?

Thanks!