47RE swap (photo ID)

I found this transmission for sale the seller says it is a 47RE from an unknown year. The speedometer cable attachment point looks to be an electrical plug from a newer ECM controlled truck. Can this be converted to accept a mechanical speedometer cable?

Loooking to swap into 1967 Barracuda with 418 340 stroker.

Any help and advise would be appreciated.

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(Info added: this is a diesel bellhousing)