LPG, Bio Diesel, Hydrogen, Fuel Cell Questions and Answers last answered over 2 years ago.
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Had two webbers on my old Aircooled - 40 downsomethings...(sorry bout lck of knowledge) Did just about fit with thin air filters (pancake??) and cutting a bit of the insulation away from the lid....
Hope this helps
Emma
2.1 DJ 1990 Caravelle (died and gone to heaven)
2.0 AGG (1997 ish) 1984 transporter LPG