I respectfully disagree. They started using the cone type in 1969 in every carrier. The clutch type unit was discontinued after 1968 (a few left over clutch types got used up in early 69) but the 741 case was used until the end of the run of 8-3/4 rearends so they did come with cone type SG's. Shouldn't even matter anyway cause the OP didn't say it was original
