After a whole 60 miles the car broke down again!
My mechanic friend was convinced that the torque converter had parted company from the flex plate - how wrong he was!
What had happened was alot worse!
The bolt in the top cambelt tensioner had sheered off causing the belt to go slack and skip a few teeth, bending pretty much all the valves in the process.

However, having diagnosed the previous engine with a head gasket failure, I have the gaskets and bolts ready, along with the heads from the old engine. Swindon engines used stock heads when building this engine so nothing will be lost by swapping for the heads from the original engine.

This presents me with the opportunity to do a few things I didn't have time for when I swapped the engine, and put right a few things that I got wrong before. Firstly, the heads are having the exhaust ports opened up to match the 3.2 manifolds.
Before:

After:

I didn't swap the dipstick tube last time as I didn't see the difference in them until after the engine was in, so that's being done now, and the heater matrix will be flushed through so hopefully I'll have some heat in the cabin.
Today saw the engine stripped down and the new heads prepared for fitting tomorrow.
Game on!