How much cutting needed on '75 Rover 3.5 w/ Rover 5 speed

[tdskip]

Basically asking about taking my TR8 drivetrain into a '75 MGB. I've read some conflicting things and figured best to just ask here.

Thanks!

[MGBV8]

Check the Google Images. That piece on top of the tunnel is it. Unless you want fenderwell exit headers.

https://www.google.com/search?q=mgb+rover+lt77+tunnel&client=firefox-a&tbm=isch&tbo=u&source=univ&sa=X&ei=16GkU5GXIs-lsAT4yYH4DA&ved=0CB4QsAQ&biw=1200&bih=627