There is someone here who did that on an F1 (on purpose) to facilitate engine removal. It was quite a well engineered solution.
Actually, it may have been one of the frame guys on
www.sohc4.net - if you've not heard of it, register there too (use the same username so that we recognise you). They have 10x as many members as us but tend to be more US-centric
Steve
(Moderator on both...)