go hide in your corner and cry for 6 months.
if you like that then try it.

i have au xr8 seats. problems i have found are the seats sit to high and to far forward. but im used to it now.
i think ba is the same.
if ya real keen i can show ya how iv done mine.
best thing with mine is you can unbolt the seats and bolt them straight back into an au.
honestly if i went back in time i would not try. i would pay to get something like ebxr6 seats re upholstered.