spacer for kr tensioner on agu

can anyone  give me a idea on how much to space the tensioner out on my 20v T for the mk1 engine mount to fit

I think its spaced out so the cambelt lines up properly, i also think i read its 8mm

ill have to have a look into it then i thought  it was so the engine mount dont catch  ill try sorce some more info on it cheers bud