Well, we can close this thread and close the issue for me- I ordered the SPEC 1 with SPEC flywheel.
Also ordered my oilpan and new shift forks online from Bill, and will be ordering the shortblock once I can get hold of him on the phone. Sacramento Cylinder Head quoted me $500 for a rebuilt pair of heads which seems a bit high but don't have time to find some at a junkyard. I'm sure they'll do me good on getting some good ones. Question on the heads which I'll post in a new thread ....