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How you doing mate... I am the buddy Dxs speaks of. I've had my fair share of headaches with the EF8 driveshafts. I've tried a few combinations and what I can say is:
- Early DA axles are too short...

i picked mine up from ebay

before and after of my old one...
http://i79.photobucket.com/albums/j146/shadowzdragon/progress/DSC01518.jpg
http://i79.photobucket.com/albums/j146/shadowzdragon/progress/photo0076xgh8.jpg
...

the Tanabe SMH that snoop gee pictured isn't a bad system. It's fairly quiet at low rpm and performs well. quality is excellent too... runs well in my b18c EF8

try this one
there used to be a few other sellers...they've disappeared though. best to ask the seller if they definitely do H4H

Sell the motor and buy a halfcut. It will save you lots of messing around

EF8 has the rare H4H bulbs. I've seen a few kits on eBay US selling them...