So, what can I shoehorn into a Fiat 124?

Just sling a 6BT Cummins in it. Let it hang out the front. Who cares if the suspension won't hold it up? Just let it sit there and idle in the driveway.

Actually I was thinkin more like a Detroit 1-71 or 2-53, LOL

Bet the damn thing still weighs at least 500