A friend has an '81 Imperial & is looking to do something with the car. They're heavy, is staying small block the way to go? What's involved with putting a big-block in one? Has anyone done a modern HEMI conversion?

Digital dash all works, how difficult is it to maintain its use with "major' changes under the hood. What headers work with the stock front suspension/chassis?

Looking for ideas - the good the bad & the ugly!!