The numbers i've posted are indeed correct. Thanks to all for the great info, i haven't had a chance to get under the car to check out the vin number on the block. If in fact its the original engine i will have it rebuilt.
They didn't start stamping the oil pan rail with the yr., plant and last 6 of the vin until 69. Your 68 willl have the numbers stamped on the top rear of the block close to where the trans bolts to it, The trans should be stamped the same place except on the trans.