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Can't ID my block (with photos)

Tim Chavez

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Hey guys, I'm having a lot of trouble identifying the block in my 71 charger 500. Vin says it should be a 318. The intakes from a 73 demon 340 and the heads say 70-71 340/360 when i look them up. The number stamped on the drivers side front of the engine just below where the head mates reads 31990498. Your help would be greatly appreciated
 
You can look at the casting number thats on the drivers side. Part of that number is the engine size. In the mix it will show 318, 340, 400 etc. The casting numbers can be broken down to production dates also.
 
Hello and welcome to the Forum!
-This is the "New Comers, welcome forum-
You might try posting this in the "Engine/performance forum

BUT:
Here is a chart showing Block casting numbers:
CASTING NUMBER SIZE FAMILY YEARS OTHER COMMENTS
1737629 361 1961 - 1964
1851629 413 RB 1961
1852029 413 RB 1962
1852029 413 RB 1962-63
1852029 426 RB 1962-65
2120229 361 B
2120329 383 RB 1959-60
2120429 361 B
2120529 413 RB 1959-65
2128854 361 or 383 B 1964
2202843 170 G
2202857 225 RG
2205528 225 RG
2205630 170 G
2205697 413 or 426 RB 1959-65
2205712 361 B 1958-66
2264230 318 A 1960-67
2264478 170 G
2406730 426 RB 1963-65
2440873 426 RB
2463230 170 G 1965
2463252 273 LA
2463430 225 RG 1966
2465330 273 LA 1964-66
2466090 318 LA
2468030 413 or 426 RB
2468130 383 B 1959-71
2468230 318 A
2468330 426 RB 1964-65
2468330 426 RB 1966-71 HEMI
2532130 383 B 1965
2532230 426 RB 1964-66 Wedge
2532630 318 A
2536030 318 LA 1967-75
2536130 273 LA 1965
2536430 440 RB 1966-72
2566080 318 LA
2586430 ??? ?? ???? Contact Us If You Have Info
2658836 426 RB
2658930 361 B 1965
2780930 340 LA 1968-73 Not T/A or AAR
2806030 273 LA 1966-69
2806030 318 LA 1961-74
2806130 273 LA 1965-69
2806830 225 RG
2899830 383 B 1970
3418496 360 LA 1971-74
3577130TA 340 TA LA 1970-71 T/A and AAR
3614230 400 B 1971-72
3698630 400 B 1973-78
3698830 440 RB 1972-78
3810230 360 LA 1975-78
4006530 400 B 1976-78
4006630 440 RB 1975-78
4104230 318 LA Race Engine
4179930 360 LA 1975 - 1993
Please note that this isn’t a complete list of the Mopar Engine Casting Numbers.

OR:
Casting Number CID Year Type Remarks
2202843 170 1960-64 G
2463230 170 1965 G
2463395 170 - G
2264478 170 - G
2205630 170 - G
2463430 225 1966 RG
2806830 225 1968-70 RG Includes 198
3462605 225 1975 RG
2951694 225 - RG
2202857 225 - RG
2205528 225 - RG
2465330 273 1964-66 LA
2806030 273 1966-69 LA
2463252 273 - LA
2536130 273 1965-69 LA
2806130 273 1966-69 LA
2264230 318 1960-66 A Polysphere
2468230 318 - A Polysphere
2532630 318 - A Polysphere
2466090 318 1967-74 LA
2806030 318 1966-69 LA
2806030 318 1967-74 LA
2536030 318 1967-75 LA
2566080 318 - LA
4104230 318 - LA Race - Painted Orange
2780930 340 1968-73 LA Except T/A & AAR
3577130TA 340 - 6 bbl 1970 LA T/A & AAR
1944929 350 1958
3418496 360 1971-74 LA
3870230 360 1975-78 LA
4179930 360 1975-1993 LA
1737629 361 1961-64 B
2120329 361 1958-66 B
2120429 361 - B
2128854 361 1964 B
2205712 361 1958-66 B
1945429 361 1965 B
2658930 361 1965 B
2120229 361 - B Industrial
1852029 413 1959-62 RB Max Perf. & Truck
2120529 413 1959-65 RB
2205697 413 1959-65 RB Passenger Car
2468030 413 - RB
2658836 413 - RB Industrial
2205697 426 1964 RB Passenger Car
2406730 426 1963-65 RB Wedge & Max Perf.
1852029 426 1962-65 RB Wedge
2468030 426 - RB Wedge
2440873 426 - RB Wedge
2532230 426 1964-66 RB Wedge & Max Perf.
2658836 426 - RB Industrial
1851729 383 1959-64 B
2128854 383 1964 B
2532130 383 1965 B
2120329 383 1959-60 RB Golden Lion
2899830 383 1970 B
2568130 383 1959-71 B
2468330 426 1964-71 RB Hemi Head
2536430 440 1966-72 RB
2658836 426 - RB Industrial
3614230 400 1971-72 B
3698630 400 1973-78 B
4006530 400 1976-78 B
3698830 440 1973-78 RB
4006530 400 1976-78 B
4006630 440 1978 RB

mopar.gif


Sorry, cant seem to find that number
More research is needed
 
its a roadblock ive hit many times. ive since cleaned the area even deeper to confirm the number. posting to the forums is my last shot. no matter where i search i cant seem to find that number but its clearly stamped on the block where the block casting number should be
 
its a roadblock ive hit many times. ive since cleaned the area even deeper to confirm the number. posting to the forums is my last shot. no matter where i search i cant seem to find that number but its clearly stamped on the block where the block casting number should be
Look on the other side, your CID will be listed in that casting number
 
Are you sure that is NOT the VIN sequential number?
-what is stamped on the front pad?
 
oops,
kryslerkid beat me to it

Yes, that is VIN sequential
NOT Block casting

So, with the tables I provided above you should be able to find what block it is
I'll bet its a 400
 
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