Re: New Horse Power Ratings
Stock Horsepower Changes
OEM NHRA New
Make CID HP HP HP Years Affected
Buick 350 175 266 262 73-74 Apollo
Chev 454 270/365 365 360 71-72 Chevelle
Pontiac 455 250 310 306 73-74 Firebird
Olds 455 380-390 371 362 68-69 Hurst
Stock Horsepower No Changes
OEM NHRA
Make CID HP HP Years Affected
Buick 350 155 240 77-79 Regal
GM 173 107/112 135 82-84 Camaro/Firebird
Chev 265 180 205 1955
GM 305 215 258 85-86 Camaro/Firebird
Chev 350 160/190 275 78-80 Camaro
Chev 350 245 310 73-74 Camaro
Chev 364 400 391 05-07 Corvette
Chev 396 375 ??? incomplete request
Chev 396 325 325 1968 Camaro
Chev 454 425 420 1971 Chevelle
Chev 454 390 415 1970 Corvette
Mopar 361 305 270 61-62 B bodies
Mopar 383 335 300 68-70 Challenger
Mopar 440 375 ??? incomplete request
Mopar 440 390 417 70-71 B bodies
Ford 302 225 215 89-92 Mustang
Ford 302 205 220 1993 Mustang
Pontiac 455 360 350 1970 GTO
Super Stock Horsepower Changes
OEM NHRA New
Make CID HP HP HP Years Affected
Chev 283 220 238 235 65-66 Big car
Chev 350 295/300 322 317 67-69 Camaro
Chev 454 425 475 469 71 Corvette
Ford 281 235 235 232 2010 Mustang
Super Stock Horsepower No Changes
OEM NHRA
Make CID HP HP Years Affected
Chev 427 430 476 1969 Camaro
Chev 454 390 415 1970 Corvette
Chev 350 295 327 1969 SS/GT no such combo
Chev 350 300 327 1969 SS/GT truck
no such combo
Chev 350 300 322 67-70 SS/GT
Mopar 383 ??? ??? 63-67 B Bodies incomplete request
Mopar 426 ??? 450 64-65 Coronet incomplete request
Mopar 488 400 425 93-98 Viper
Olds 350 170 255 77-80 Cutlass
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