Have gone down this morning to check the vents on the box.
Looks like I will have to do a slight redesign and find some slimline vents to fit, or make some narrower grilles.
Also, mate Martin, like me, is using an MX5 blower and switches in his 66 C10 truck.
It is a direct retrofit to the original airbox with no cutting etc.
The switching is either by original switch, or a multi speed switch.
VIDEO BELOW.
https://youtu.be/18tMWTUCvbY
Coming together bit by bit.