Still not a reproduced spindle.
You need a ball joint adaptor to keep your UCA’s, and then you would need the rest of the 73+ Mopar disk brake set up with the option for SBP drilled on the hub because the SSBC stuff wouldn’t fit anymore.
Further, just because you have the 73+ kit with the SBP added to the hub doesn’t necessarily mean you’ll be able to reuse your SBP wheels. Some work, some will not.