I have a 87 cutlass supreme. The 307 is gettin tired but the car is in great shape other than that. 103,000 miles. I have been looking at crate motors.What will fit, without major mods and what is the best choice. I dont want to hurt originality down the road if I decide to sell. Of course I will keep the original motor. I have all other original wheels,etc. that I have taken off. Many opinions welcome.
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