I have a hypothetical situation that I would like to hear your thoughts on. I know this has probably been discussed to death, but this is just a hypothetical situation and I'd like to hear your hypothetical answers! You've just bought a 240z that is rust free, has been painted once and needs another paint job in the near future. Interior has been removed but is all there. The original engine has been rebuilt but the previous owner took it out and started to swap in a Chevy small block. Other than actually placing the motor in the engine bay, nothing else has been done. He included the original L24 in the sale, which is supposed to run. The goal of the car isn't to restore it, but just be a fun weekend car with a few modifications (wheels, suspension, seats might be trashed so maybe some vintage-looking racing seats). The car will never be 100% original. You might want to talk it to the odd track day, but no serious racing. You also have access to a nearly free 280z parts car that has a fresh engine in it (but the body is shot). What engine would you choose? Would you finish the swap and go for the extra power? Go original and put the 240 motor in? Keep with a Datsun motor but go L28? Again, sorry if this has been discussed 78974452 times just looking for some pros and cons!