200tdi + 6cyl box = headache!!

Bought myself a nice LWB 2a with a horrible Perkins 3.3 in, no probs thinks I, just bung in a 200tdi (minus the t) and trundle off in a practical classic.
Pulled out the Perkins no worries, ripped the bits i dint want off the 200, matched up the studs to a spare series housing and......NOOOOoooooo!
6 cyl box! not only are the studs in a different pattern but the housing is a different dia by about 10mm....ahhhhhh......anyone got a series 4cyl box kicking around???

if you can't get a complete box the bell housings are interchangeable.

i have an old 2.5na box here somewhere and a series one.pm me if you want me to post .....