Can anyone tell me under what circumstances these pushrods would be installed in any engine?

Builder claimed literally under oath they were custom made for the engine. (434 iron block etp 255 heads)

 

Looks like some really nice racing style pushrods. If the motor had say jesel shaft mounted rockers or some crazy heavy valve springs I could see it. I work for Richard Childress Racing and thats the style of pushrod they run on cup engines.

 

what length ? what wall thickness?you can order custom length push rods from companies.

 

All different length pushrods though? Makes no sense.

 

Dunno, Help me here, please... The receipt has Comp 7175-16 listed. This seems bizarre but if I am missing something please let me know.

 

The length difference maybe because of the valves being seated differently in the valve seats