I know you can’t turbo a 914 but if you have a 911, this engine might appeal to you.
1986 Turbo engine. Currently in a car and running but will be pulled this weekend. Carefully maintained by owner with an upgraded intercooler and ball bearing turbo. Never run above 1 bar. Good oil pressure and leak down. Engine was run in a 1985 Carrera with a 915 trans. The shorter ratios of the 915 made it a really fun car. It gets on boost much faster than the long legged 930 trans. Engine is for sale at $28,500. Email - Mark@MarkEpstein.net to purchase.
I do have a short video of the engine running in the car.