just thoought id pop in,
just done a disco 200tdi into my Na 90 bout 2 weeks ago,engine mounts line up straight in,so does all the bellhousing bolts,use bolts insted of studs or vice versa BUT put all them in,the hardest bit about the conversion has to be the exhaust as i basically stated at the front & worked my way back choping & welding to make a new system,although mine is loads different to the standard system anyways,
you dont "have" to cut the bulkhead but a took a large section out basically to give more room & have a larger air gap betwen the exhaust n footwell,
any more Q's drop me a pm & ill give you my No