I had an 84 xr4i on LPG, still got all the kit actually, got rid of car long ago due to rust.
Piece of piss to fit, bit time consuming but straightforward, kit i had has 90 litre torpedo tank between wheel arches.
Pm me if you want any more info.
tabetha
ps kit is TARTARINI 99, ROLLS ROYCE O KITS, cost me £1,300.