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If the block is an 85 or 87 it is a standard LA series block as the magnum engines didn't come out until 91. If your car is set up for a SB then the motor will bolt right up with no mods required. Even if it is a Magnum motor you will not have to change anything on your car as long as the car is set up for a SB as the 73 and up cars used a different k-frame for a SB and BB.
