Russel,
Lots of variables with this discussion..... So here my opinion and thoughts.
For a crated X, thats a pretty nice price, according to published sales that I watch.
Understand off market private sales can variate hi/lo extremes. I do hear about those also on occasion.
HP is around 65.... But with the small numbers built, If memory serves me right, I believe I've heard as hi as 72 on dynos. Off hand I don't know the numbers on torque, but its pretty hefty.... They pull hard OEM around 3k rpms.
H5 cams (getting hard to find now and pricey), and some other tweaking will get it up there ..... 80+.
Was at Jamie Jones last spring, and was very proud of a fresh one he built, that had just dyno'd 100. This of course was much more than just doing the cams.
Dave Lockhart and Ham LaForge both from N. C. Area and Tony Dominy of Georgia area..... Would be some great resourcing for your area. I'm sure there are more, maybe closer..... Check the registry on this site, and superxowners site..
Let us know how it goes here on your venture.....
Bruce