I think you may be right that an A7/A10 front end has been fitted, as closer inspection of your photo seems to show that the bucket (cowl) is an A7/10 item, the clues are the horizontal chrome(?) flash, and the switches fitted on the right hand side instead of left, the rear switch hole has probably been cut as the A7/10 seems to have only one switch there?.
Do you have any more detailed photos of the assembly?