Turbo for mild 408?

My goals would be to build a mild mannered but fast street car. I don't have an aftermarket block so I think anything over 600 FW hp starts to be questionable. However at 408" I do worry about back pressure causing damage to either engine or turbo with the gt45 knockoffs.

Feedback appreciated. At this point I'm kinda daydreaming but I could also see myself going for it.