This:

Aston Martin 4.3 L V8 into this:

This:

1962 Volvo P120 back it up with a TR6060 and a Mustang Cobra IRS and diff. Leave the exterior alone minus some Craigers, beefier tires and Cherry Bomb side pipes. Give it Wilwood brakes all the way round. The interior will be redone with Mexican blankets.