tight fit me thinks. just layed head on the block. throtle bodies are so tight on rear bulkead there imposibile to fit with out modifing bulkhead

You need to put some seats in and sit in the car before you start modifing the bulkhed. There's not a lot of room for manouvre.

I've only got little legs (30" inside leg) but my seats are tight against the bulkhead and there is no way I could find any more space in there.

What about elbows and turn them into downdraughts. Presumably that would mean modifications to the engine cover and maybe less visibility through the rear window but easier I'd think than bulkhead mods.

I take it that it's a BMW K head?

Iain

The K.A.D. Hillclimb Cox Coupe has a large bulk head box to clear the inlet for it's twin cam head. There is more than enough room in the cabin.
I would asume that there can't be that much of a difference between that one and yours
From memory the box at the rearward end of the tunnel extends upwards with a slightly wider part at the top. I think