ride your TT bike so you get used to the position.
^This. Don't start off with an extreme position though, let your body get used to this new position and then make changes if you think your body can manage it.
Maybe invest in an adjustable stem, and/or a versatile clip-ons like Zipp Vuka, which allow the pads to be stacked.
The frame potentially has a shonked BB shell, but it's nice so worth trying to save it. Will keep this in mind if I get to building it up. Thanks a lot and will keep you posted
^This. Don't start off with an extreme position though, let your body get used to this new position and then make changes if you think your body can manage it.
Maybe invest in an adjustable stem, and/or a versatile clip-ons like Zipp Vuka, which allow the pads to be stacked.