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The NHRA Stock/Super Stock Committee has reviewed written requests from Sportsman racers in its evaluation of specific Stock and Super Stock horsepower adjustments and has made the adjustments noted in the chart below. The changes are effective June 17, 2002. The review is part of NHRA's commitment to evaluating requests from the Sportsman racing community and is an important step in NHRA's Automatic Horsepower Factoring System (AHFS).

The list represents letters received by May 20, 2002. Letters received after that date will be addressed during the next review.

Requests for horsepower changes or reviews may be sent via e-mail to Bob Lang (Blang@nhra.com) or Curt LaShure (clashure@nhra.com); via fax, (215) 343-0159; or via mail to NHRA Stock/Super Stock Committee, 366 Easton Road, Warrington, PA 18976.

Super Stock Horsepower Changes
Manufacturer	CID	OEM HP	NHRA HP	HP Adjustment	New HP	Years Affected
AMC	343	280	270	-5	265	1967-69
AMC	360	290	290	-10	280	1970
Buick	455	315	315	-22	293	1971
Chevy	283	220	230	-5	225	1957-61
Chevy	282	220	235	-5	230	1964-66
Chevy	305	150-200	260	-5	255	1983-87
Chevy	327	250	265	-5	260	1965 (SS only)
Chevy	327	275	300	-5	295	1966-67 (SS only)
Chevy	327	300	300	-5	295	1968 (SS only)
Chevy	327	300	290	-10	280	1962-67 (SS only)
Chevy	327	300	290	-5	285	1962-67 (GT only)
Chevy	350	175	290	-5	285	1982
Chevy	350	155-270	295	-5	290	1971-81
Chevy	350	255	295	-5	290	1969
Chevy	350	295-300	315	-5	310	1967-70
Chevy	427	390	395	-5	390	1967
Chevy	427	425	440	-5	435	1966-69
Chevy	454	345	400	-10	390	1970
Dodge	340	275	295	-5	290	1971 (Plymouth)
Dodge	383	280-335	310	-10	300	1963-71 (Chrysler/Plymouth)
Ford	289	210	215	-5	210	1964 (SS only)
Ford	302	230	235	-10	225	1968
Ford	302	290	305	-10	295	1969-70
Ford	427	425	440	-10	430	1966-67
Olds	305	145-180	255	-5	250	1979-84
Plymouth	340	240	275	-5	270	1972-73 (Dodge)
Plymouth	360	175	278	-5	273	1974-80 (Chrysler/Dodge)
Pontiac	400	225	295	-5	290	1974
Pontiac	455	250	315	-5	310	1973-74
Pontiac	400	340-350	340	-10	330	1968-69

Stock Horsepower Changes
Manufacturer	CID	OEM HP	NHRA HP	HP Adjustment	New HP	Years Affected
AMC	232	155	155	-10	145	1968-70
Chevy	283	195	195	-20	175	1963-67
Chevy	327	340	340	-65	275	1962-63
Chevy	327	360	360	-75	285	1962-63
Chevy	427	435	480	-45	435	1967-69
Chevy	454	450	460	-10	450	1970
Dodge	318	120-230	230	-35	195	1967-68 (Chrysler/Plymouth)
Dodge	318	150-165	240	-10	230	1981-83 (Chrysler/Plymouth)
Olds	307	140-180	245	-5	240	1980-90
Olds	455	365-370	365	-5	360	1970
Plymouth	273	235	230	-10	220	1965-67 (Dodge)
Pontiac	307	130-200	200	-5	195	1971-72
Ford	428	335	375	+5	380	1968 Shelby (F5WE-A head only)
Ford	428	335	375	+5	380	1968-70 (F5WE-A head only)

Stock/Super Stock Horsepower No Changes
Manufacturer	CID	OEM HP	NHRA HP	Years Affected	Class
Chevy	327	275	270	1967	Stock
Chevy	350	270	270	1971	Stock
Chevy	427	430	470	1969	Stock
Dodge	360	200	280	1974	Stock
Dodge	360	245	305	1974	Stock
Ford	302	235	248	1995	Stock
Ford	351	266	303	1973	Stock
Ford	351	275	325	1972	Stock
Ford	351	280	315	1971	Stock
Ford	352	250	250	1964	Stock
Plymouth	340	240	285	1972	Stock
Pontiac	301	150	200	1979	Stock
Pontiac	455	250	320	1972	Stock
Cadillac	425	180	240	1971	Super Stock
Chevy	400	180	300	1974	Super Stock