My all original unmolested car may not be so original...

The letter before the number indicates the year
A=1965 B=1966 C=1967 D=1968 E=1969 F=1970 G=1971 H=1972 J=1973 4=1974


I6 Block Casting Numbers
Slant Six
Casting No CID Year Family
2202843 170 60-64 G
2205630 170 G
2264478 170 G
2463230 170 65 G
2463395 170 G
******* 198 G
2202857 225 RG
2205528 225 RG
2463430 225 66 RG
2806830 225 68-70 RG
3462605 225 75 RG
2951694 225 RG