i like to have the duration at .200 for that cams the spec are 251 at 0.50
259 600 and 625 lift and what are the lobe designs symmetrical lobes
or Asymmetrical lobes and torquer lobe or high RPM lobe
tank

The 284 is 162 at .200, the 292 is 170 at .200.
To put them in perspective, the 292 is 2* shorter at .020, 1* bigger at .050, and 4* bigger at .200, with about the same lobe lift, as a 1990 Crane F-258/3733 Chrysler-profile cam, as well as being 10 years older. The 284 is master F8, the 292 is master F4, both made in April 1980.
No UltraDyne was symmetrical. The 284/292 was always sold as a torque cam, although that is more a function of its' size than anything else. The 321/329 with 288/296 at .050, 196/203 at .200, and .685"/.685" valve lift was in the exact same cam design family.
The 284/292 had the dynamics for over 8000, but not the area-under-the-curve to support much horsepower up there.

UDHarold