69 Z28 Engine question

[Angus777]

Looking at a 69 Z-28 for sale.  X-33, Engine is a DZ code but not original to car as it was a June assembly and car was a January 1969 build.  All original from bottom end to the Holley carb. 

How much is the value affected by the engine not being original to the vehicle?  In this case an exact duplicate built several months after the car was built?   Remainder of drivetrain is original to vehicle M22 and 12 bolt #'s validated.  Appreciate anyone's thoughts from your experience.

[jdv69z]

I heard numbers like 20-30% deduction?

[Angus777]

Thanks.

[X33RS]

I guess it could be that high.  It's different for different people.  Depends on how much it's worth to you or your budget.  Just finding a real Z without tag issues these days is a high water mark, lol.

[Kelley W King]

If the DZ has the vin, you might post it in the orphans and recoup some and maybe get another non matching engine.

[Angus777]

Thanks very much!

[6667ss138]

30% deduction is what Jerry M. said at a seminar and BJ auction last January.

[HOT3O2]

30% deduction is what Jerry M. said at a seminar and BJ auction last January.

X2 That's what I've heard in the past too.