Pilgrim Sumo anyone know this car ?

[silv]

Anyone know this car ? reg no H---EJR It is a MK3 body dark blue with silver stripes, black interior, side exit exhausts and individual roll bars. First registered in 1994 with I think is a Chevy engine fitted. I am trying to establish If the car is built on a MK2 or 3 chassis and whether the donor was Sierra or Granada. I have spoken to Pilgrim they have been very helpfull but can't answer all my questions.