Big and Small Block Crankshaft ID

Big Block

Crank Number Engine Type Application
1521436 413 forged truck 8-bolt crank extended flange
1737641 LB forged used very little
1737642 383 forged 1959-61 pass. car
361 1958-61 pass. car
350 1958 pass. car
1851127 413 forged 1959-64 pass. car
1851436 413 forged 1960-77 truck 8-bolt crank extended flange
1855527 383 forged 1959-61 pass. car
1978698 RB forged 1959-61 pass. car
2203155 LB forged 1959-61 Pass. car
2206157 361 forged 1960-78 truck 8-bolt extended flange
2206158 440 forged 1966-72 pass. car
1971-77 truck
413 1962-65 pass. car
426 forged 1963-65 pass. car
2206159 400 forged 1971-78 pass. car
1972 truck
383 1962-78 pass. car
1967-71 truck
361 1972-78 truck
1962-66 pass. car
2206160 440 forged 1966-78 pass. car
1970-80 truck
413 1962-65 pass. car
426 forged 1963-66 pass. car
2402330 426 forged 1963-64 Max Wedge
2463548 426 forged some high compression 1964
426 Max Wedges 8-bolt crank flange
3462923 400 cast 1971-78 pass. car
1973-79 truck
3482923 383 cast 1969-71
3698641 RB cast used very little
3751877 400 cast 1973-78 pass. car
1973-79 truck
3751888 440 cast 1973-78 pass. car
4027172 400 cast 1973-78 pass. car
4027175 440 cast 1973-78 pass. car
1973-79 truck
8698461 440 cast 1973-78 pass. car
1973-79 truck

B/RB Forged Crankshafts

Year Description Avail. PN
1958 All 350 cid
1958-66 All 361 cid
1959-65 All 413 cid
1959-61 All 383 cid "RB"
1959-71 All 383 cid "B" 2268114
1962-64 413/426 Max Wedge 2406240
1963-65 All 426 Street Wedge
1967-70 440 HP cid 2536983
1970-71 440 Six Pack 3512036
(external balanced)
1971 440 cid
1972-73 440 HP cid 3671283
1973 440 std. cid 3671242

B/RB Non-Forged Crankshafts

Year Description Avail. PN
1971 Late '71 383 cid 3462922
1972-74 400 4bbl. cid 3672000
1972-78 400 std. cid 3462922
1974-78 440 cid 3751889
1974 440 cid 4529067

(Shot peened & hardness checked)

Small Block

CASTING | YEAR/CID | MATERIAL | STROKE | MAIN DIAMETER
---------------------------------------------------------------------------------------------------
2128278 64-7/273 Forged Steel 3.31 2.50
2128869 64-7/273 Forged Steel 3.31 2.50
2205700 64-7/273 Forged Steel 3.31 2.50
2532457 68-72/340 Forged Steel 3.31 2.50
2658278 68-69/273 Cast Iron 3.31 2.50
67-80/318
2843868 68-72/340 Forged Steel 3.31 2.50
3418640 71-80/360 Cast Iron 3.58 2.81
3418641 71-80/360 Cast Iron 3.58 2.81
3418642 71-80/360 Cast Iron 3.58 2.81
3462387 73/340 Cast Iron 3.31 2.50
3751841 76-79/318 Cast Iron 3.31 2.50
4027169 78-80/360 Cast Iron 3.58 2.50