290HPBAXR6

Hi guys, I'm a newbie to Performance Upgrades, so I thought I'd get some ideas from some of you experienced performance junkies. I have recently bought a BA XR6 that has already had Stage 3 cams fitted, oversized injectors, extractors, an X-Force exhaust and lowered about an inch and a half. It was performance tuned by a reputable company and dyno'd at just under 300hp. So it's no slouch. It needs some repairs done, rear struts/shocks, diff, one of the front bearings sounds like it's on its way out and some fibreglass needs some loving on front and rear bumpers. And an idling problem (surging revs and stalling on occasions) which I will hopefully have sorted over the next week. What I want to know is, aside from the obvious turbo upgrade, what else can I do to it to give it that extra VROOOM I love?? Any suggestions would be greatly appreciated 👍