VL Turbo gear would be the easiest.
eBay manifolds rarely fit correctly, been there done that on my VL -_-
I turboed my VL with ebay gear and a darkhalf remap, worked well... for about 3 days...
Running a bit lean man. http://i64.photobucket.com/albums/h199/zoidbergmerc/Cars/sparkplug.jpg
Great learning experience though.