LR90 Heater leaking

I did a search first but couldnt find exactly what i was looking for.

I noticed the heater pipes on the 90 I just bought were blocked up.
I bought it cheap as 3rd gear was gone. but however its just a bit difficlut to find. so I applied the " I must of bought this of a fool theory" and tried to reconect it. I noticed a leak from the pipe and tightened the clip and it was fine. I though woohoo! however it was short lived. the cab steamed up and there is water dripping from where the big box thing connects to the bulkhead.

What i would like to know is it hard to remove the entire box and how do i do it. do i need to drill out the rivets. or does it unbolt complete from somewhere I thought i would ask (would really love some pics if its poss) before i pull the whole thing to pieces

Thanks.

It unbolts from the bulkhead two 8mm bolts at the top and two 6mm bolts at the bottom. To get at the heater matrix the rivets will have to be drilled out of the top panel.
There are a few pics in here.
http://www.landyzone.co.uk/photopost/showgallery.php?cat=660&ppuser=2139

Thanks for that. will have a go now, is that unbolt from the bulkhead means the screws are in the dash side or engine side.

engine

Aye.