Know the history of this car?

The present owner is seeking any history on the car including previous owners who may be able to help provide some of the missing history over the last 42 years. Does anyone know this car, originally a rubber bumper model finished in Glacier White?

Posted: 181128
This MGBGTV8 was originally produced as a rubber bumper model in Glacier White on 27th January 1976 and three days later it was despatched to Dutton-Forshaw in Blackpool. It has never been registered with the V8 Register but clearly at some stage it has undergone a chrome bumper conversion and a bodywork colour change to Black. The present owner reports it "was modified in 2003 by RPI Engineering to a 4.6 litre V8 with stunning power". It has a louvred bonnet and a front spoiler.

The present owner is seeking any history on the car including previous owners who may be able to help provide some of the missing history over the last 42 years. Does anyone know this car?