I’ve read multiple posts about upgrading calipers but most referenced SSBC 185 from Summit. These have been likely discontinued. Curious if anyone that’s done the front caliper upgrade recently from Sierra to SSBC and could post a link/reference/model number. calipers are 20+ years old and brake fluid at least 10 years.
Looks like this A193 could be a direct bolt on. They state "Rear" but given the small disc / rotors in front, looks like a possible bolt and fit.
https://www.summitracing.com/parts/tsb-a193-10