Bob, your name sounds familiar, but it's not connecting with anything in my head. I might recognize you if I saw you--I'd be more likely to recognize your car from then...
A few of the folks from back then are around on here; Sergio is "PCA7GGR", Winders is "winders", Mike M. is "mahler9th", and there are others that you might recognize. I've seen them on the Racing section of the forum; there are probably others around in other sections as well. I still have that light-blue 914...
Replacing the CHT can be a pain--it is somewhat buried under the engine tin, and with a steel sensor threaded into an aluminum head, it isn't hard to strip the threads. Penetrating oil can be your friend on this.
100 PSI sounds like more than enough compression to start, and if the cranking sounds even that's a good indication.
Replacing injectors is easy. There are a number of places that will do the cleaning and/or refurb, another one I've heard of around here is Witchhunter Performance. The better places will replace the screen in the inlet of the injector, they may replace the pintle cap, and they'll all flush the injector with solvent and generally document the flow and spray pattern.
Have you read through Brad Anders' D-jet Bible?
Brad's '70 914 2.0L Has lots of info on what makes D-jet tick, and some troubleshooting info as well.
--DD