If there's one car to spend $20M on, that's the one. Alternatively, you could get yourself a '67 ticket and get it that way. Though I know some people don't like to restore the save until they get what they want.
To be honest, I didn't like driving the GT40 much (then again, it's a standard), the Mark IV, on the other hand, is a pleasure to drive, and hear. Particularly if you spin out, and have to reverse, and then start to accelerate, it's just a pleasure listening to. Though currently, I'd rather not spin out, I want to get down the Ring at least once without spinning, and yes, that's with TC and ASM off. Still working on it!
I am so very happy to have spent my limited bank account on this Ford Mark IV '67 car, I had no idea it was so damn stable on the Nür, Stock!
I bought it, got the pennyless trophy, had no money to buy oil change, who cares, it was new, and fired up the Nostalgia Seasonal, after downlimiting it to allowed 550pp, on it's racing hards.
I browsed some allowable settings, and maxed front and rear aero, (then rear at 55 to get more engine pp!)
Set my LSD to IT: 9 , AC: 30, Decel: 15 , Camber 2.0 / 1.8 , Toe -.02, +.18, Brake Bias 5/6 , Anti Roll Bars 4/4, Damber Ext 7, Damper Compression 5. (this is my holy grail for G25 wheel settings)
default tranny, default everything else. I wish I understood spring settings, I don't touch these, unless I browse Tuning Subforum for the magical tunes. I wish I had time to tune, but I'm not retired yet, and work 9-6, & need my beauty sleep.
Set the viewpoint to those crazy front aero tire covers taking up half the screen estate, and giggled as I caught 1st place way before the 1st Caroussel.
3rd attempt, I raised RH +1 /+1, just for kicks, and won it sub 7 minutes, at 6:58 , only smooth driving, no aggression needed.
(smooth safe driving comes naturally after having driven this track for 6 months straight, 1 hour daily on average)
very doable.
Everyone get this car now.
The only minor drawback, is sense of speed (due to engine notes being subtle and low, but beautiful), you are driving way faster than you think. which, is good, in a way. Because, driving fast, you are.