If I were you and really wanted a race car I'd drop the idea of having some 944 or mark that you can affordably be able to run 10's in. I would by some mustang, late 80's early 90's that already has 400 rwh and run that. you can get a 11 sec mustang for just as much as you want to put into your mark. Plus theirs a million people that have them, parts are dirt cheap, and their effective in the quarter mile. Unless your rich, your probably never gonna have some super street mark VIII. granted some people have them but they know the costs and labor that go's along with racin them. You look at these post and see the hours and money these guys have spent, they have alot of love for their lincoln's.
Point being ask some members how much money it takes to have a really fast mark. Then ask how much time it took them. If you wanna just go to the track and be satisfied runnin 13's or 14's your on the right path, but if your looking for serious racing, i think you need to see what would benift you the most with the funds available to you.
Like me, I have a 02 conti, and it's fast for what it is, I will never meet someone else driving a conti that will outrun mine, but I know that it will never be a 11 sec car, and theirs alot of cars out their that will smoke me hands down. But like most lincoln owners I love my lincoln, I can't see myself selling it to get anything else thats faster It is what it is and i'm fine with that. I just wanted something different.