BS question, car with diff engine value question

[CSG]

I am curious to hear some other people's opinion on this. Before long I will need to purchase the engine for my car.
Car relevant details:
69 Camaro
DSE subframe and quadralink
MillerBuilt fabricated full floater 9"
C6 Z06 brakes
T56
Very nice paint & body but not a perfectly gapped and aligned panel car.

So anyway, like a lot of you, money has become tighter to come by lately which has me questioning my engine choice. I am currently looking at two options. A Pace 495 HP LS3 or a Mast 630 HP black label street LS7 engine.
All said & done I would probably pay around 10k more if doing the MAST. My question is how would the two engine options effect the value of the car if I sold it? To me the Mast engine would make the car worth at least 10k more if I was purchasing. I am wondering if others feel the same.