Theres one S13 that stands out to me in the FD field. It covers all the bases and while it is a pro level car it can be emulated with skill and not a huge amount of money. When removing weight you improve nearly every aspect of a drift car.
Open archs make life easier on the fabricator and mechanic.
While we are at it heres something Scorch Racing Japan (find them in my blogroll) came up with. While this is a drag car and would need some more stiffening of the strut towers to be a circuit/ drift car it another take on the simple tube front end.
Keep your eyes peeled for my S15 V1 tube front in the next post