Which leaf springs to use?

Will the SS springs work well with the Leaf Spring relocation to the frame rail. I am building a '68 Barracuda for 90% track and 10% car meets. I'm tossing around the Split mono option or the QA1 rear setup, but the SS spring is also an option. I am running a 318 right now but the 440 is coming this winter. This is my first drag car being built so the the rear setup is new to me. Oh rear tire is a M/T drag radial 275/60r15 on a home built 9 inch wheel.