R33 Rb26 Strange Engine Number

[32vspecII]

hi yall

have a r33 gtr here with a strange engine number :703144X

Ive never seen a 26 with an X suffix and 703 is a strange number also , they are generally linear numbers.

Engine does look like its been out, car had other expensive stuff but engine is basically stock externally.

[a31lunacy]

i have a x on my engine # as well i think i have been told this means a replacement block from nissan so any chance your engine could have been rebuilt. i bought my engine thinking it was standard but i ended up finding out the engine had been rebuilt , had n1 turbos,and a chipped ecu so you could be lucky have you had the sump off you will def know if ya have a look