How can i tell a 727 from a 904 yolk?

[SirDan]

How can i tell a 727 from a 904 yolk?

 

[redfastback]

How can i tell a 727 from a 904 yolk?

Count the splines. 904's have 25-26, 727's have 30.

 

[SirDan]

Count the splines. 904's have 25-26, 727's have 30.

Thanks for the info!