If I remember correctly when he machined Erics gearbox for me he took 1.5 off the bell housing and 1.5 off the Gearbox casing.

Quote Originally Posted by Strat Fan View Post
I can't comment on the Integrale but there is the 3mm steel strengthening plate which can be added to Fiat/Alfa boxes between the bell housing and the gearbox casing which is used to help prevent the diff/crown wheel from separating from the pinion shaft. This requires 3mm to be machined from the gearbox casing to me it fit.
Neil did this to his old 164 box. That bit didn't fail but he stripped 4th gear shortly after....
Click image for larger version. 

Name:	Gearbox Strengthening Plate (1).jpg 
Views:	99 
Size:	42.3 KB 
ID:	19169Click image for larger version. 

Name:	Gearbox Strengthening Plate (4).jpg 
Views:	99 
Size:	66.7 KB 
ID:	19170