can someone iID this engine number for me

[JNadal]

6105639

thanks

[KobaltBlau]

someone will probably help you, but get the 911 Red Book. It's small and cheap.

[Bobboloo]

70' T

610xxxx

6=6 cyl
1=T
0= year 70'
xxxx= serial no.

620xxxx = 70'E
630xxxx = 70'S

[JNadal]

thanks for the help