Bench to bucket seat interchange?

[UKPlymouth]

Hi guys, I'm assuming this is straightforward, but I intend to fit two good bucket seats from a '73/4 Charger into my '73 Roadrunner to replace the badly damaged/worn bench seat.
I'm aware that the floor Pan needs drilling for the buckets. Anything I'm missing here before I proceed?

 

[Photon440]

- - - Updated - - -

Should also have the reinforcement plates for the new hole location. Such as these:
http://www.ebay.ca/itm/MOPAR-1971-7...Parts_Accessories&hash=item35cf7cba38&vxp=mtr

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