7.3 bore size

[swamp_ratt]

All research ive done online shows a 7.3 to have a 4.11 bore but my machinist mic'd it out at 4.10. Is there something different about my block?

 

[Magnum PD]

According to my Haynes book, the bore for 94 and later is 4.1096 to 4.1103 so yours is in the range.