Okay, so into the FS-ZE.
Finally sourced M14 bolts ( 2 x 100mm 2 x 120mm ) and have the engine up on stand.
Investigation under the valve cover reveals a not entirely unexpected bit of under-whelming news. This engine as Edwin pointed out came from an all wheel drive and as such equipped with FS-1E intake and exhaust cams. I haven't been able to find much info on these other than they are torque biased ( which I am still uncertain what that might mean in a practical sense to my application ) just that they are not what I want.
I had at some point pulled the cams from a 2001 spicy orange MSP at pick 'n pull and was going to use if I could dig them out of the garage ( needles in hay stack lol ). However to my delight I woke up this morning to find a message from the fellow that build the rally car I just purchased as a donar for my build saying he has 2 new in the box Jspec cam shafts for that car he never got around to installing. A brief negotiation later and I now have cams sorted ! FSH9-12-420 and FSD7 ( as sold by SR motorsports ). Absolutely sick, now the only outstanding issue is the crank pulley, which when the 10 o'clock postman brings me a letter ( and lightweight hydramotor sports pulley ) this engine is green for go !
The fellow who sold me the cams was also happy to share the history of his car and pointed me to some local resources. Great day so far [emoji41]