Track only?

4 links like horsepower. A 9.90 car (low 1.40 60s or so) will need to get the gear retios right to make it work. A 2.45 727 should be fine. I like 4 links. It allows you to do so much more than a ladder bar. But I don't think a ladder bar would be a handicap in your situation. The closer you get to the 8s, the more a 4 link makes sense. Spend the money on a good, pro level ladder bar system and some good coil-over shocks, support the back of the car correctly and you should be fine.

One thing I have noticed is at the local chassis shop he does a lot of 4 link adjustments for guy's that can't figure out how to make their cars hook. Scales and computer system are used to place bars into correct holes. And that being said, just gets you in the ball park. It might be a piece of cake for some but most guy's can't find their ass with both hands setting up a 4 link.

You may want to buy a good chassis book to help you understand the terms and how to set up the parts under your car properly the first time
I traded for a 108 inch wheelbase 1970 Cuda chrome moly tube chassis car(A arm front suspension, 4 link rear with Koni double adjustable steel coil overs on all four corners) minus motor several years back, the car had a blown B1 motor on methanol that had gone mid 7 at 184+ MPH. I didn't touch the 4 link set up at all, I did weigh the car on individual scales to get the corner weights and weight distribution with me in it.
I put one of my 505 C.I. bracket motors in it and hoped it would work
It did work very well
It has gone 9.03 at 147.+ MPH so far with me in it weighing right at 2800 Lbs.
It has a Dana 60 with 4.56 gears and a 1.81 low gear set A1 Powerglide and 14x32x15 stiff wall M/T drag slicks