Hi Rhys,
A warm welcome to the forum, i,m sure you,ll find lots of helpful info from fellow builders here ,
There are a couple of builds in progress using the Bmw as the donor, have a play with the search facility & see if that finds some past posts with info that may help.
The Roadster is very fortunate to have a some very good suppliers who are all forum members....Saturn Sports Cars , 3GE, Talon & me too (
), from these suppliers you could get practically every part needed to complete your build.
Have a read thru the diifferent sections & i,m sure you,ll find all the info you need.
I,ve moved this thread into the "General Discussion" section .
best wishes for your future build.
cheers
andy