X flows timing is easly checked from start to finish,
Basics
The notch in the front pully is like a chisel mark not to worry there, No1 spark plug out long thin screw driver down bore bring piston to top dead centre, rocker cover off see if No 1 Rockers are top dead and No4 is rocking, that will inform you timing chain hasnt slipped.
That was my first thought: one link slip on the timing chain is about 20 degrees.
Pretty unlikely to be a slipped timing chain, given the OP has driven the car back from Bristol with no apparent problems!! In all the years I've built, used and abused Crossflow engines in all states of tune, I've never actually managed to get the timing chain to slip
You should be able to turn the engine over on a spanner from underneath as it were!
I've used the H&H electronic ignition kit for the Motorcraft 771 distributor, absolute doddle to fit. Can't really comment on performance improvement as I fitted it at the same time as a 5spd gearbox and new Weber DGV carb
Arwyn
