DATA FOR PONTIAC ENGINE BLOCK CODES 1964-74 SOURCE: YEAR ONE, INC. #R525 *ALL CODES IN PARENTHESIS ARE AUTOMATICS* -YEAR- -SIZE- -H.P.- -ENGINE CODES- ------------------------------------------------------------ 1964 326 250 92X, 92W, (92J) " " 326 280 94X, 94W, (94J) " " 389 325 78X, 78W, 789, (79J) " " 389 348 76X, 76W, 769, (77J) ------------------------------------------------------------ 1965 326 250 WP, (ZN) " " 326 285 WR, (YP) " " 389 335 WT, (YS) " " 389 360 WS, WV, XS, (YR) ------------------------------------------------------------ 1966 326 250 WX, WP, (XF, XN) " " 326 285 WR, (WG, YP) " " 389 335 WT, WW, (YS, XE) " " 389 360 WS, WY, XS, (YR) ------------------------------------------------------------ 1967 326 250 WP, WX, WC, WH, (YO, YN, XF, YJ, XI) " " 326 285 WR, XR, WK, WD, (YP, XG, YM, XO) " " 400 255 (XL, XM) " " 400 335 WT, WW, (YS) " " 400 360 HO WS, WV, (YZ) " " 400 360 HO XS, YR, (XP) ------------------------------------------------------------ 1968 350 265 WD, WC, (YN, YJ) " " 350 320 WR, WK, (YP, TM) " " 400 265 (XM, YA) " " 400 350 WT, XZ, (YS, XH) " " 400 360 HO WS, (YZ) " " 400 360 RA1 XS, (XP) " " 400 366 RA2 WY, (XW) ------------------------------------------------------------ 1969 350 265 WC, WP, WM, WU, (XL, YJ, XR, YN, XB, YE, UY, XS) " " 350 330 WR, WV, (XT, XU, YP) " " 400 265 (XM, YZ, XX, YB, YF) " " 400 350 WT, WX, (YS, XH) " " 400 366 RA3 WS, (YZ) " " 400 370 RA4 WW, (XP) " " 400 375 RA5 WI, WY, (XY, XW) ------------------------------------------------------------ 1970 350 255 W7, WU, (X7, YU) " " 400 265 (XX, YB) " " 400 330 (XZ, XV) " " 400 350 WX, WT, (XH, YS) " " 400 366 RA3 WS, (YZ) " " 400 370 RA4 WW, (XP) " " 455 360 WA, (YC, YH) ------------------------------------------------------------ 1971 350 250 WR, WU, WN, WP, (XR, YU, TN, YP) " " 400 265 (XX, YX) " " 400 300 WK, WT, (YS) " " 455 325 (YC) " " 455 335 HO WL, WC, (YE) ------------------------------------------------------------ 1972 350 160,175 WR, (YU, YV, YR) " " 400 200 (ZV, ZX) " " 400 250 WK, WS, (YS, YT, ZS) " " 455 220 (YA, YC, Y4) " " 455 250 (YD, YK) " " 455 300 HO WD, WM, (YB, YE) ------------------------------------------------------------ 1973 350 150,175 XR, WV, ZB, ZD, (Y2, Y7, YR, YV, ZR, ZV, WA, WC, WD, WF, WL, WN, XZ) " " 400 170,185 (YI, YP, YX, YZ, Y4, ZK, ZX, XH, XI, X3, X4) " " 400 200,230 WK, WS, WP, YF, Y6, YG, (YN, YX, YT, Y3, ZN, ZS, XK, XN, XX,XZ, X5) " " 455 215,250 (YA, YC, YD, YK, ZA, AC, XA, XE, XJ, XL, XY, XT, X7, XO, YE) ------------------------------------------------------------ 1974 350 155,170 WA,WB,(AA, YA, YB, YC, ZB, YN, YP, YS, ZA) " " 350 170-200 WN, WP, (YN, YP, YS, ZP) " " 400 175,190 (AH, YH, YJ, ZH, ZJ, AD, YF, TK, ZD, ZK) " " 400 200,225 WT, WR, Y3, (AD, YL, YM, ZS, AT, YT, YZ, ZT) " " 455 215,250 (AU, YR, YU, YW, YX, YY, ZU, ZW, ZX, A4, Y4, Y6, Y9, Z4, Z6) ------------------------------------------------------------- 1975 ----------------------------------------------------------------------- 1976 350 160 (YB:2bbl) " " 350 160 (YR:2bbl) " " 350 165 (ZX,ZF:4bbl) " " 400 185 WT:4bbl " " 400 185 (YS, YZ, ZK:4bbl) " " 455 200 WX:4bbl ---------------------------------------------------------------------- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --------- ALSO SEE NEXT SOURCE BELOW ------------ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX ENGINE BLOCK CODES FOR 1959-80 PONTIAC V-8. SOURCE: YEAR-ONE #R432 YEAR CID ENGINE CODES ------------------------------------------------- 1959 389 532000 1960 389 536387 1961 389 538181 1961 421SD 538181 1962 389 538181 1962 421SD 538181 1963 326 548211 1963 389 543680 1963 421 544988 1964 326 9773153 1964 389 9773155 1964 421 9773157 1965 326 9778840 Early 1965 389 9778789 Late 1965 421 9778791 1966 326 9778840 1966 389 9778789 1966 421 9782611 1967 326 9786339 1967 400 9786133 1967 428 9786135 1968 350 9790079 1968 400 9790071 1968 400-RA 9792506 1968 428 9792968 1969 350 9790079 1969 400 9790071 1969 400RA4 9792506 1969 328 9792968 1969 303 546313 1969 400RA5 9792968 1969 400RA5 545887 1970 350 9799916 1970 400 9799914 1970 400RA3 9799914 1970 400RA4 979991(5) 1970 400RA5 481708 1970 455 9799140 1971 350 481990 1971 400 481988 1971 455-HO 483677 Early 1971 455-HO 485428 Late 1972 350 481990 1972 400 481988 1972 455 485428 1972 366 (485)212 1973 350 488986 1973 400 481988 1973 455 485428 1973 455-SD (490)132 1974 350 488986 1974 400 481988 1974 455 485428 1974 455-SD (490)132 1975 350 488986 1975 400 488986 Early 1975 400 500577 Late 1975 455 500813 1976 350 488986 1976 400 500577 1976 455 500813 1977-79 400 568557 1977-?? 350 ??????