Looked at it today. I like the frame. Some of the graphics are identical to the triangles and squiggles on the '88 Ironman. Identical. 54cm. After trying to ride a 54cm Prestige, Lemans RS, Schwinn 564, Trek 560, I'm pretty sure I can't ride it. 54x54, too, so too short.
Nice bike, OEM. Aluminum lugs, bonded to the tubes. Very light, nice chro-mo fork (lugged crown). Has the OEM Shimano Mountain LX 48/38/28 crankset and long-cage Mountain LX RD. Looks like the FD is the same as the RSX. Exage hubs, calipers. I could really do a number on it, move it to Tiagra 3x9 and modern wheels, probably have a triple between 20-21 lbs (OEM 58cm was 21.5)....Alas, not to be.
For want of 2cm....
You shouldn't change the Frisbee.
1985 Raleigh Racing USA - Coleman's Competition
1984/85 Klein Performance
1988 Centurion Dave Scott Ironman Master
1989 Centurion Dave Scott Ironman Expert
1989 Centurion Carbon R