Keno, two schools of thought on tt position.
1. Most common is to Rotate forward. This makes it easier to get into the aero position but is tough on not so pristine knees.
2. Maintain your current saddle position and get your torso as low as possible. This will allow you to continue using the biggest muscle (but stretched more) to propel you forward and keep your knee friendly position. It's not easy but regular training at really low position helps. This is my favored option.
One problem though. If you're carrying anything extra, you won't be able to get low enough.
So, if you can find one, buy a used Look KG196. It's a wicked fast bike. As
mentioned, you will need a 73 st. Mine will fit you plus it has the mega adjustable Look seatpost and integrated ergo stem.
It's not for sale but you can drive down and give it a spin.