1967
Pontiac 400: WI, WQ, WU, WZ (manual), YT, XN (automatic)
1968
Pontiac 400: WZ (manual), YT (automatic)
Pontiac 400 HO: WQ (Manual), YW (automatic)
Pontiac 400 Ram Air: XN, XT (automatic), WU, WI (manual)
1969
Pontiac 400: WZ (manual), YT (automatic)
Pontiac 400 Ram Air III: WQ (manual), YW (automatic)
Pontiac 400 Ram Air IV: WH (manual), XN (automatic)
1970
Pontiac 400: WK, WS, WT (manual), XX, YS, YX (automatic)
Pontiac 455: WC, WJ, WL (HO) (manual), YC, YE (HO) (automatic)
1971
Pontiac 400: WK, WS, WT (manual), XX, YS, YX (automatic)
Pontiac 455: WC, WJ, WL (manual), YC, YE (automatic)
1972
Pontiac 400: WK (manual), YS, YX, ZS, ZX (automatic)
Pontiac 455: WD, WM (manual), YB, YE (automatic)
1973
Pontiac 400: WK, WP, WS, Y6, YG (manual), Y3, XN, YS, YX, YZ, ZK, ZX (automatic)
Pontiac 455: WT, WW (manual), YA, YC, YD, YK (automatic)
Pontiac 455 SD: W8 (manual), Y8 (automatic)
1974
Pontiac 400: WT, Y3 (manual), AD, AH, AT, YT, YZ, YF, YH, ZJ, ZK, YL, YM, A3, YT, AT, ZS, ZT (automatic)
Pontiac 455: AU, YW, YY (automatic)
Pontiac 455 SD: W8 (manual), Y8 (automatic)
1975
Pontiac 400: WT (manual), YS (automatic)
Pontiac 455: WZ (manual)
1976
Pontiac 400: Y9, YS, YZ, ZK, Y9 (automatic) WU, WT (manual)
Pontiac 455: WX
1977
L78 Pontiac 400: XA
W72 Pontiac 400: Y6, YG (automatic) WA (manual)
Olds 403: VA, VB, U2, U3
1978
L78 Pontiac 400: YA, YU
W72 Pontiac 400: X7, WC
Olds 403: VA, VB, U2, U3
1979
W72 Pontiac 400: PWH (manual only)
Olds 403: Q6, QE, QJ, QK, QL
Pontiac 301: X4, X6
1980
Pontiac 301: XC, XM, XN, YN
Pontiac 301 Turbo: YL
Chevy 305: CEL, CEM
1981
Pontiac 301: BD, BJ
Pontiac 301 Turbo: BO, CJ
Chevy 305: D6A, D6B, D6D, DHA, DHB, DHC, DHD, DHF, DHH, DHJ, DHK, DHU, DHZDJ, DKB,
READ THE LINKS
http://ronspontiacpage.com/reference-pages/blockid.htm
http://www.pontiacstreetperformance.com/psp/blockID.html
http://www.wallaceracing.com/engine.htm
http://www.teufert.net/identify/identify.htm
http://www.teufert.net/identify/identify.htm
http://wallaceracing.com/head1.htm
https://en.wikipedia.org/wiki/Pontiac_V8_engine
http://wallaceracing.com/head1.htm
http://www.antiquecarparts.net/tech04.htm
http://www.pontiacpower.net/castnum01.html
http://ronspontiacpage.com/reference-pages/stockheadspecs.htm
http://www.bassettracing.cz28.com/custom3.html
http://www.classicpontiac.org/FAQ.asp?myPage=V8HeadInfo