I believe you would ruin the resale value of the car, and also turn off both the Ford and Chevy fans.

Camaros appeal to muscle car fans, who generally are brand-loyal. Stepping up to a bigblock Chevy would enhance the appeal.

At the risk of making Ford fans commit suicide .....the staggered valve BBC had a horsepower advantage over the BBF. :-)

....unless of course you mean a cammer or shotgun motor. If it were a cammer, the motor alone would be worth more than the whole Camaro!