Value of 1.8 engine with exhaust system and full FI system, What's it worth? Options

[fiacra]

I've been offered a 1.8 engine along with the full exhaust system and all the fuel injection components from a 1974 914 that is about to have a -6 conversion. The car has been maintained at a locally well known independent Porsche shop, and the owner of the shop is a friend so I know what I'm being told is reliable. At the moment there are some unknowns -- compression and leak down numbers. However the engine runs well, doesn't smoke, has been properly maintained under the current owner, and just had a $300 rebuilt AFM installed, so there is at least that.... I don't NEED another engine for my 1975 1.8, but I do have the garage room to store another engine so maybe having another engine and all the components as a spare is worth it (IMG:style_emoticons/default/confused24.gif) I might get a bit more power out of my current engine if I swap out the exhaust components, or so I've been told. Given the above (granted, some key information is missing), any thoughts on what the value of this package is? I curious to hear what the hive mind thinks this would be worth.