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Gans's AMC Info

AMC Engine Specifications Engine specs 6 and V8

199 232 258 290 304 343 360 390 70-390 401
Production years 1965-1970 1964-1979 1971-1990 1966-1969 1970-1981 1967-1969 1970-1991 1968-1969 1970 1971-1979
Bore 3.75 3.75 3.75 3.75 3.75 4.08 4.08 4.165 4.165 4.165
Stroke 3 3.5 3.895 3.28 3.44 3.28 3.44 3.574 3.574 3.68
Deck height 9.531 9.531/9.281 9.281 9.175 9.208 9.175 9.208 9.175 9.208 9.208
Bore spacing 4.38 4.38 4.75 4.75 4.75 4.75 4.75 4.75 4.75
Main journal 2.5 2.5 2.5 2.7472 2.7472 2.7472 2.7472 2.7472 2.7472 2.7472
Rod journal 2.095 2.095 2.095 2.0944 2.0944 2.0944 2.0944 2.2481 2.2481 2.2481
Piston pin diameter 0.931 0.931 0.931 0.931 1.001 1.001 1.001
Compression height* 1.6 1.601 1.6 1.601 1.553 1.518 1.508
Rod length 6.125 6.125/5.875 5.875 5.875 5.875 5.875 5.875 5.79 5.858 5.858
Deck clearance - - - 0.06 0.012 0.06 0.012 0.045 0.045 0.002
Firing order Firing order 1-5-3-6-2-4 Firing order all V8s  1-8-4-3-6-5-7-2
Piston dish volume - - - - - - - 16 24 41
71 28
Compression ratio* #VALUE! 8.42
Intake valve 1.787 1.787 2.025 2.025 2.025 2.025 2.025
Exhaust valve 1.406 1.406 1.624 1.625 1.625 1.625 1.68
late 70+ 1.68 1.68
Rocker ratio 1.6 1.6 1.6 1.6 1.6 1.6 1.6
Push rod length 7.767 7.8 7.767 7.8 7.767 7.8 7.8
72+ 7.82 7.82 7.82
Head volume 52 57.9
Lifter bore 0.904 0.904 0.904 0.904 0.904 0.904 0.904
Head gasket thickness 0.022 0.028 0.048 0.048 0.048 0.048 0.048
Head gasket volume cc 5.51 5.59 10.95 10.95 11.34 11.34 11.34
Head gasket diameter* 4.411 3.939 4.210 4.210 4.284 4.284 4.284
Valve length 4.800 4.800 4.800 4.800 4.800 4.800 4.800 4.800 4.800
Valve stem diameter 0.372 0.372 0.372 0.372 0.372 0.372 0.372 0.372 0.372
Push rod diameter 0.3125 0.3125 0.3125 0.3125 0.3125 0.3125 0.3125
Rod thickness 0.992 0.992 0.000 0.000 0.000 0.000 0.920
Rod offset
Horsepower Pre '72 are gross
68 128 145/255 200/225 235/280 315
69 128 145/255 200/225 235/280 315
70 128 145/155 210 245/290 325/340
71 145 160 210 245/290 330
72 100 110 150 175/220 255
73 100 110 150 175/220 235
74
Torque Pre '72 are gross
68 182 215/222 285/300 345/365 425
69 182 215/222 285/300 345/365 425
70 182 215/222 305 365/395 420/430
71 215 245 305 365/395 430
72 185 195 245 285/315 345
73 185 195 245 285/315 345
74 185 195 245 285/315 335
* = computed