ChampCar Tech Desk

The tech desk is used to ask technical questions and is not to be used as a post race tech line or to phish for how others built their cars.
Please reference the BCCR as most questions submitted to the TechDesk can be answered by reading the BCCR.
You can download the BCCR here: https:champcar.org/rules

2020-11-12 - K20A2 block interchange with K20Z3 block

Q.
My team bought a parts car to replace our damaged engine.  After removing the engine and delivering to the machine shop, we found out the block is a K20Z3 instead of a K20A2.  
If we use this block, will it cost us engine swap points?

A.
The K20Z3 block may be substituted for the K20A2 block (and vis-versa) due to there being 0 performance difference.

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