When I bought the Buick, several parts came loose in a box, including the foot pedals and linkages.
I can’t find any pictures of right hand drive Buicks in the manuals, even the UK Buick manual I have shows LHD pictures, so the pedals are on the wrong side, and the linkages are presumably different.
Tom in Australia has very kindly sent photos of his car and these inspired me to go to the storage container and find my pedals.
I found & fitted brake & clutch pedals which seem fine, but I do not appear to have the accelerator pedal or linkages.
I have put an appeal on the AACA forum for photos or info.
http://forums.aaca.org/f165/rhd-buick-manuals-316633.html click to follow my pedal enquiries.
Many thanks to Colin who sent me this fantastic early Christmas present-
a right hand drive accelerator pedal.