I think it's a straight swap with the ducellier.. Our Sceptre MKIII had a very annoying flat spot on acceleration, after fiddling with the ignition for hours, we changed the ducellier for a lucas one and it solved everything and now still runs lovely this was 4 years ago.. Was a straight swap so should be the same with our rapiers...
'68 sunbeam rapier fastback {B341006846 OD/LHO} I like a car that looks normal but really knocks your socks off!!
my fastback has a ducellier distribtor, i have several spare lucas ones but they dont seem to fit in the drive snugly the slotted part fits ok but the lucas ones have a raised dome at the bottom
anybody know if they are a direct swop as i ultimately would like to fit a h120 version without vacuum advance as i have fitted twin webers