No the 95 TBI 454 engine was around from 90-95 (GEN V BBC). The 454SS trucks had that same engine and they started production in 90 as well.
Mark IV BBC pre-90
GEN V 90-95
Vortec 7.4L 96-00
There are tons of parts for the Mark IV that will interchange on the TBI BBC, and there are lots of people running TBI or Tunnel ram setups on Mark IVs.