Sure you can run 10's with a leaf spring car but you are giving up about .5 in ET and a bunch of consistency on marginal tracks.
If you build the chassis right the first time you'll save a ton of money in the long run. Even a CalTrac set up with all their stuff is going to be a grand or more. While the CalTracs are good they were really designed for cars that had to keep the leaf springs because of class rules. In my opinion if you can 4 link it, why waste time and money doing something else when you'll eventually do it anyway.