Mine shaeks a bit too, OEM hood. I've been up to 140 and it gets really fluttery but no issues. I probably should install pins too...
You can do it with a stock hood, any brand is good really... Some aftermarket hood makers can pre-drill for you too so its super painless. Just prep/paint/install and go.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.