Valintines Day, wossat ?
Deano if you need any precise pics just email. Wipers can only really fit in one spot make sure the rubber isolators are there too , bolts are regular M8 I think.
Mebby the 10x6x4" shoebox/amp can be mounted on the top of the glovebox with some type of bracketry

Deano you legend, that's awesome! 

And Marty that was what I was thinking, plastic weld or araldite some brackets to the top of the glove box and hey presto you have a mount for a relay box. 
 
Hey it even looks like there is enough room up in there for one of those small A/C modules if you REALLY wanted to get fancy, then you could run the lines straight out the main loom hole or down the pillar and out into the front L/H guard area....

A plan is forming! 


 
Im not going crazy am I? I'm 90% sure that would fit, you could then run the tubes and T into the left, center and right vent hoses. Would take some messing about but that's half the fun!

definitely would fit without a glovebox, possibly with one.
You could duct tape a mock up onto the glovebox top and see if it fits?

Not crazy, just a good thinker and trend setter !
If you get time to watch Retro Power cars, they do a bunch of fit ups like this, they often use 3D printing to totally resign the heater box/ a/C box and pipe angles etc. you don't need to use what's there is what I'm saying..

I totally redesigned the heater box in my mk1 van as I didn't want water pipes entering the cab so I went with a caravan electric portable heater. I meshed the two together and modifying the box internally to work better and seal better, plus I used a small thermo fan to move the air which I positioned inside the box and used a car boot seal to seal in the air flow from outside.