Engine swaps in general. Especially from the crowd that doesn't have the money, skill, or time to do one but it's all they talk about.
Disagree
I'm in the camp of swap anything into anything. Great way to learn is just get your hands dirty. Who cares if you don't think you have the skill, get at it. Engine swaps are tough, and I'm not saying to jump in feet first into the deep end as your first project, but get out there and do something you don't think you can do. A lot of people don't have the luxury of friends/family with knowledge/access to learn from, and sometimes you just have to make a go on your own, and do you.
I want more LS swaps into Mustangs, 4BT swaps into Camaros and 240's, SBF's into Volvo's, Volvo's into Mustangs. SWAP ALL THE THINGS