Would i allow one of my kids to have a SRT-4 as their first car.... no.
Have plenty of kids had them as their first cars.... yes.
Can a 6'4" person fit comfortably.... yes.
I don't mean for this post to offend you in any way, but you're still a kid, and kids are stupid. (I have 3 of them...) These cars can be a handful and if not properly respected can get you into a lot of trouble and/or danger very quickly. They do not have any of the modern safety features (traction control, skid control, etc.) which would be standard on any modern car that has the sort of power an srt-4 makes. Couple that with the terrible crash test ratings and the history of SO SO SO many people killing themselves in these cars, i just don't think its smart.
Now, of course, this is only my opinion and i realize opinions are like assholes. (everyone has one and no one wants to hear it.) My kids are not to the driving age yet, and i'm not having high hopes for my oldest being a very responsible driver as she just doesn't seem to care about anything.... UGH...
I do, however, applaud you on planning to work to earn the money to save up for something you want. Keep that mentality throughout life, it will serve you well.