old days people use bosch in tank pump, as long as you can get fuel pump to sits in the bracket and connects to both fuel hoses.
see pics of original fuel pump+bracket:
http://www.gtr.co.uk/forum/134596-photo-sock-orientation-r33-fuel-pump-needed-please.html
if you are cheap and going with walbro pump, you might need to do 14v re-wiring for safety.