Wow, dude, you have no income and you want to blow 4g's modifying a 2.3 Mustang? Didn't you just say you had to sell the Mach because you don't have enough income to help pay the bills? Do you realize that makes ZERO sense?
I will say it one more time. If you choose to ignore it again then its your problem from that point on. Sell the Mach, BANK THE CASH so that you can LIVE off of it while you DON'T have much income. It will support you until you DO have income. If you want to use a couple HUNDRED bucks to clean up your notch and make it a good, clean and reliable daily driver then do THAT but do NOT blow that money on another money pit weekend car which will only put you in the same EXACT situation that you are currently in with the Mach. Your notch provides you with reliability and economy but hey, you still get to rock a Mustang.
I am driving a damn Bronco II right now because I knew that if I got a Mustang, I would pour tons of money I don't have into it. I am now looking into getting a Mustang because I am in a little bit better position, but I know I will have to be smart about how I approach the project.
Times are tough all over, and you can't expect to just keep skating along having fun and spending money on toys when you don't even have money to pay bills. Get your priorities straight, man
Sorry for coming off like a jerk but I have been down this road myself more than once and I know how it feels to be a young car enthusiast. Fact is that as you drive down the road, no one is checking you out and judging you poorly because you are driving something sensible instead of flashy and loud. Do what you gotta do now, and later it will pay off.