Originally Posted by Flexin' XJ
I didn't think the vortec was introduced until 1996? My grandpas '95 motorhome had the 454 and it wasn't a vortec. I know the 4.3 liter vortec came out earlier, but I don't know about the 454s.
correct '96 was first year for vortex motor. this '91 would just have a tbi 454