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General Interchange

Year    Car / Trans         I #
'61     Starfire            555
        others              553
'62-63                       14
'64     J88 early           645
            late            681
        others               14
'65     J88                 681
        others              693
'66     J88                 723
        others              724
'67     8-330               816
        8-425 W/AIR         817
              W/O           921
'68     8-350               819
        8-455               921
'69     8-350               819
        8-455, 2BC          921
               4BC, 365 HP  921
               4BC, 390 HP  921
'70     8-350               920
        8-455, 2BC          921
               4BC, 365 HP  921
               4BC, 390 HP  921
'71     8-350               958
        8-455               959

Toronado Interchange

Year    Car / Trans         I #
'66-67                      725
'68-69                      822
'70     375 HP              921
        400 HP              926
'71                         957

F-85 Interchange

Year    Car / Trans          I #
'61-63  2BC                  344
        4BC & Jetfire        345
'64     6 cyl                642
        8 cyl, early         645
               late          681
'65     6-225                683
        8-330                681
        8-400 (442)          693
'66     6-250, W/AIR         722A
               W/O           722
        8-330                723
        8-400 (442)          725
'67     6-250                722B
        8-330, early         816
               late          820
        8-400
        W/Outside Air Ind    821
        W/O                  725
'68-69  6-250                722B
        8-350
        W/Outside Air Ind    922
        W/O                  819
        8-400, 2BC ('68)     921
               4BC
        W/Outside Air Ind    923
        W/O                  822
        8-455 (Hurst), W/AC  923
        W/O                  924
'70     6-250                894
        8-350
        W/Outside Air Ind    925
        W/O                  920
        8-455, 2BC           921
               2BC, 442
        W/Outside Air Ind    924
        W/O                  926
        exc 442              921
'71     6-250                894
        8-350                958
        8-455, 2BC           959
               4BC
        W/Outside Air Ind    960
        W/O                  957
        exc 442              959

Interchange Number to Specific Head

I #  Head Cast #   Vehicle / Notes
 14  584782        cast 583832. Olds '62-63, Olds '64 exc J88
344  577745        Olds F-85 '61-63, 2BC. Note: May substitute 345's in sets.
345  582163        Olds F-85 '61-63, 4BC & J/fire. Note: May substitute 344's in sets.
553  580419        cast 577608. Olds '61 exc Starfire.
555  582836        Olds '61 Starfire.
642  1369427       Buick Special '64 V-6 eng.
                   Olds F-85 '64 V-6 eng.
645  384462        Olds early '64 J88 8-330 W/CI rockers.
                   Olds F-85 early '64 8-330 W/CI rockers.
                   Note: May substitute 681 assy by including push rods & rockers.
681  387575        Olds late '64-65 W/steel stamped rockers.
                   Olds late '64-65 8-330 W/steel stamped rockers.
                   Note: May substitute 645 asy by including push rods & lifters.
683  1396787       Buick Special '65-67 V-6 225.
                   Jeep CJ, DJ & Jeepster ser V-6 225.
                   Olds F-85 '65 V-6 225.
693  387573        cast 383821. Olds '65 exc J88.
                   Olds F-85 '65 8-400 (442).
722  3938931       Note 1: B fits A by plugging the water temp switch hole.
                   A does not fit B.
                   Note 2: Fits 631A, 631B, 647A, 647B & 647C.
                   Note 3: On mdls under A & B having AIR the heads are drilled &
                   tapped for the air injecion reactor tube. These drilled & tapped
                   heads will fit models not having AIR by plugging the holes.
722A 3872708       Chevelle '66 6-230.
                   Chev Pass '66 6 cyl.
                   Chevy Trk '66 6-230, 6-250 7 6-292.
                   Chevy II '66 6-230.
                   GMC D ser 6-230 & 6-250.
                   Olds F-85 '66 6 cyl.
722B 3895052       Blazer '69 6 cyl.
                   Buick Special '68-69 6 cyl.
                   Camaro '67-69 6 cyl.
                   Chevelle '67-69 6 cyl.
                   Chev Pass '67-69 6 cyl.
                   Chev Trk '67-69 6 cyl.
                   Chev II '67 6 cyl
                   Chevy II '68-69 6 cyl.
                   GMC '67-69 6-230, 6-250 & 6-292.
                   Olds F-85 '67-69 6 cyl.
723  394189        Olds '66 8-330 (Jetstar 88).
                   Olds F-85 '66 8-330.
724  394190        Olds '66 8-425 (exc Jetstar 88).
725  396056        Olds F-85 '66 8-400 (442).
                   Olds F-85 '67 8-400 exc Outside Air Ind
                   Toronado '66-67
816  396054        Olds '67 8-330.
                   Olds F-85 early '67 8-330 eng serial prefix W & SW.
817  396055        Olds '67 8-425 W/AIR
819  230341        Olds '68-69 8-350.
                   Olds F-85 8-350 W/O Outside Air Ind.
820  230532        Olds F-85 late '67 8-350 eng serial prefix W & SW.
821  230369        Olds F-85 '67 8-400 W/Outside Air Ind.
822  230343        Olds '68 8-455 4BC 390 HP.
                   Olds F-85 '68 8-400 4BC W/O Outside Air Ind.
                   Olds F-85 '69 8-400 W/O Outside Air Ind.
                   Toronado '68-69.
894  3977568       Blazer '70-71 6 cyl.
                   Buick Special '70-71 6 cyl.
                   Camaro '70-71 6 cyl.
                   Chevelle '70-71 6 cyl.
                   Chev Pass '70-71 6 cyl.
                   Chev Trk '70-71 6 cyl.
                   Chevy II '70-71 6 cyl.
                   Firebird '70-71 6 cyl.
                   GMC '70-71 6-250 & 6-292.
                   Jimmy '70-71 6 cyl.
                   Olds F-85 '70-71 6 cyl.
                   Tempest '70-71 6 cyl.
920  230894        Olds '70 8-350.
                   Olds F-85 '79 8-350 W/O Outside Air Ind.
921  230898        B fits A.
                   A. Olds '67 8-425 W/O AIR.
                      Olds '68 8-455.
                      Olds '69 8-455.
                      Olds '69 8-455 4BC, 365 HP.
                      Olds F-85 '68 8-400 2BC.
                   B. Olds '70 8-455 2BC, 4BC 365 HP.
                      Olds F-85 '70 8-455 2BC, 4BC exc 442.
                      Toronado '70 375 HP.
922  230619        Olds F-85 '68-69 8-350 W/Outside Air Ind.
923  230612        Olds F-85 '68-69 8-400 W/Outside Air Ind.
                   Olds F-85 '68-69 8-455 (Hurst) W/AC.
924  230897        Olds F-85 '68-69 8-455 (Hurst) W/O AC.
                   Olds F-85 '70 8-455 W/Outside Air Ind.
925  230895        Olds F-85 '70 8-350 W/Outside Air Ind.
926  230896        Olds '70 8-455 4BC 390 HP.
                   Olds F-85 '70 442 8-455 4BC W/O Outside Air Ind.
                   Toronado '70 400 HP.
957  231252        Olds F-85 '71 442 8-455 4BC W/O Outside Air Ind.
                   Toronado '71
958  231250        Olds '71 8-350.
                   Olds F-85 '71 8-350.
959  231251        Olds '71 8-455.
                   Olds F-85 '71 8-455 2BC.
                   Olds F-85 '71 8-455 4BC exc 442.
960  231253        Olds F-85 '71 442 8-455 4BC W/Outside Air Ind.
[ Thanks to Bill Culp for this information ]
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