[viking64]

appears problem is still there.

Cold Start - instant ignition
warm start - short stop - instant ignition
warm start - 20min stop or longer - very hard to start - 20 / 30 cranks
let car go cold - back to instant ignition.

so the fact if it cools down then starts indicates there is obviously fuel

could it be coils & H/T leads, weak earth somewhere when hot?

has to be something specific to this engine as previous engine was a well behaved one!