Reference Details
- Common issue
- 1970 D-port 455 HO, later SD-455, or swapped 455 engines described as the 1971 round-port HO. · 1971 Pontiac GTO 455 HO
- Confidence
- reported · 1971 Pontiac GTO 455 HO
- Correct value
- Engine code, casting/date evidence, round-port HO hardware, carburetor, intake, exhaust, and Ram Air equipment should align with the build record. · 1971 Pontiac GTO 455 HO
- Where to check
- PHS invoice, engine-code pad, block/head/intake/carburetor casting and date evidence, Ram Air parts, and service records · 1971 Pontiac GTO 455 HO
- Common issue
- 1970 D-port 455 HO, later SD-455, or swapped 455 engines described as the 1971 round-port HO. · 1971 Pontiac GTO Judge 455 HO
- Confidence
- reported · 1971 Pontiac GTO Judge 455 HO
- Correct value
- Engine code, casting/date evidence, round-port HO hardware, carburetor, and Ram Air equipment should align with the build record. · 1971 Pontiac GTO Judge 455 HO
- Where to check
- PHS invoice, engine-code pad, block/head/intake/carburetor casting and date evidence, Ram Air parts, and service records · 1971 Pontiac GTO Judge 455 HO
