SOOO many questions

I'd do a full floor pan, less seams to weld and seal. Use front and rear sway bars, 1 1/8th in the front and a 7/8ths in the back. Use the torque boxes! They came on the "heavy duty package" and are needed with the 360. Look for larger torsion bar, around 1 inch. Heavy duty rear springs and good shocks. Use the spool mount kframe and check the lower control mount pin sockets for wear. You might want to have the welds checked on the kframe and I wouldn't be surprised if the guy at the shop wants to reinforce the steering box mount and weld the kframe for strength. Will this car be power steering or manual? Make sure the box is in good condition! You might want to have the lower control arms reinforced to, they add a plate to the bottom to box the arms. I don't think too much of the adjustable struts, but that would be up to you. Will you be using disks on the front, if so use the larger 11 3/4" disks. Have fun!!