checking again on Britespark it looks like both those machines were also ATD jobs so no manual end caps
and yes whitakerpedia does have some data http://www.voc.uk.com/net/docs/7.3/7.3-89-18.pdf but is from the halcyon days when you could buy a Lucas Part No. 458726-B3 off the shelf. I guess nowadays cost wise you would be half way to a BT-H , I think I will start with an ATD. Anyway its some way off I have just sent the head off to have a second 14mm plug hole added (For my decompression valve -though at 7.3 I may not need it)
Tim,
On my parts shelf is a manual A/R end cap for a K1F if you are interested???
Neil