That's the approach with "Project '68 Driver", it has a 400 with 6X heads and will run plain old pump gas without a whimper. I'm not into nitrous as I can't afford to go back to the track (too competitive for my own good and budget).

'69 needs a more stock approach. With low mileage it may not need more than hone and rings, I hope. If it needs a full rebuild I have my choice of restored stock #62s or 87cc heads, ready to bolt on. Choice of stock logs or factory long branch or ceramic coated repro long branch. But my inclination is to leave this car as close to factory as possible.

'68 resto has a 4 speed trans and will retain stock config.