I get a vortex of fumes when accelerating - and have had for years. Also I get petrol fumes on a full tank until about 20 miles then it goes away. All manifolds/pipes etc have been checked - fuel smell put down to breather pipe.
Check kingpins etc. for wear and possibly fit stiffer leaf springs & font springs - it sounds daft but it smooths the ride. Spanner Juggler is your expert on this for advice.
