I had an SR in my old S13 back then. Had 2 of them (the first one blew a rod through the case). It was fun and decently fast for back then.
But isn't it basically the same Hp as a stock FRS (200bhp)? FRS is NA too no less
..put a simple FI kit on the stock FA, and it'll make far more power than a stock SR. Or, just keep the FA stock, and it'll still have the same Hp and be better than a turbo SR, since it's 200bhp NA.