1981 380SL V-8 engine cross-reference

[von sponyiak]

Hello! I have the opportunity to purchase a 1981 380 SL convertible with a blown V-8 engine. It ran out of coolant, so the heads are warped, cylinders are scored, etc. Just from looking at it, it needs completely gone thru. I also have the opportunity to buy a 1973 450 SEL V-8. It is in running condition. My questions are: Would this engine fit? If it would fit, are the fuel-injection systems compatible? Would the new engine bolt up to the original transmission? If this engine would not work, what engines would fit? Thanks in advance!