As stated above - It's got to be what you want! For me it was most important that the unibody and corresponding sheet metal be all original, and I wanted an override car. You will be shocked how few cars retain original sheet metal let alone original engines or transmissions. The sheet metal date ranges are known , how SJ cars were assembled is known, the block casting dates are known, and you can find images of the correct stamp font used so you can see if that "original numbers matching" engine is legit or just another re stamp. Once you determine what you want, if it comes up (call Howard! get the okay on the car first!) then buy it, good cars are few and far between.