Join Date: May 2015
Location: Shoreham-by-sea, West Sussex, UK
What about the 4 (or 5) spring clips that hold the top part of the heater box to the middle section. The 2 at the back are up against the bulkhead, getting to those is easier if the whole heater box is loose/unattached on the bulkhead - 4 nuts and large diameter washers on studs hold the top part to the bulkhead
The 2 (or 3) spring clips at the front are easier, but that depends on your console
With the clips removed I found it possible to first slide out the bottom+middle section and then remove the top section. Sliding out the bottom+middle section is easier if the top section is firmly attached to the bulkhead.
On my RHD coupe with standing pedals, I slid it out towards the passenger side footwell. I understand spiders are generally more difficult.
1975 GT Junior with 2 litre lump
2006 Subaru Impreza WRX