Wardy,
 
This seems to have turned into a discussion on wether you do or don't actually need the restrictor, but in answer to your original question - I used R31 Skyline bits. In SA you need to have the restriction + a label saying "Unleaded Fuel Only". By using the Skyline bits you get both, because the cap has the usual label already on it.
 
The Skyline bits come brazed together, but come apart easily once you heat them up. I finished up using the cap and the piece that it screws into it (the bit with the restriction) from the Skyline. I used a piece of mandrel bent 2 1/4" exhaust tubing which is then brazed to the back of the original flange from the 1600. This gets rid of that silly rubber/plastic bit that always seems to leak too. The part from the Skyline with the restrictor is then brazed onto the outside of the original 1600 flange. The whole lot then bolts back onto the car from the inside.
 
Oh, you'll need to put a small "barb" on the steel piping for the smaller breather pipe too. The 2 1/4" exhaust tubing is then connected to the tank with suitably sized fuel hose and 2 clamps.
 
PL
 
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mark Ward
Sent: Thursday, 30 March 2000 18:57
To: Ozdat Mail List
Subject: fuel filler necks

Was just wondering what bits anyone has used to modify the stock 510 fuel filler neck to have an unleaded fuel restrictor ?  To engineer mine I'm supposed to have it.  Wardy 

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