From the Carter carburetor parts catalog:
Carter 9097
Primary Jet 120-4099 - orifice size .099
Rod 75-2086 - dimensions are .069 x .061 x .040
There are many sources that show what came in the Carter 10-203 strip kits.
The 9097S came on a -76 400 LB so the original jetting might be off. The 10-203 kit would be perfect. But paying $450 for a incomplete kit not knowing what you get ?