Geronimo - Here’s a numbers matching (need confirmation) 930 with a 964 body kit on it, exactly what you want. Pick this up and use it for your base to modify from. This car can easily be bought for low 50’s, which makes the entire cost of this car less than a proper wide body turbo upgrade on an SC. Like I recommended before, trade in your SC for the tax credit and finance the balance if needed. It’ll cost you less, and should also net you a better finished product when done, not to mention a lot sooner too.
https://www.ebay.com/itm/1986-Porsche-930/273892372820?hash=item3fc541f154:g:SgIAAOSwNsNcvlA y