Reference Details
- Common issue
- Later replacement engine or Tri-Power-upgraded engine represented as original standard 389.
- Confidence
- reported
- Correct value
- 389 four-barrel evidence such as 78X/79J-code-family support, correct carburetor/intake context, date-correct block/head/intake evidence and matching paperwork
- Where to check
- Engine stamp pad, casting and date codes, intake/carburetor tags, PHS paperwork and service history
