I thought I'd ask for advice about my 71 Road Runner.

This is a show car I've had for almost 30 years and it's in very nice original factory condition. Aside from a repaint in the 1980's, new upholstery, and wear & tear and maintenance, it's all original. I've only put on about 6,000 miles since I bought it.

The problem is that when I bought the car it had 100,000 miles and the engine wasn't winning any 1/4 mile races. It starts and runs reliably, but the power just isn't there.

How can I refresh the engine while keeping the originality of the car? Can a rebuild keep everything original, including the bore?

Thanks.