Thank you for all the replies guys.

This mornings task is as follows;;

Im going to buy a compression tester when Halfrauds opens
Put the standard header tank back on.

If compression is down, or if car still overheats, gonna start stripping the head.
But in the meantime, Mcdonalds breakfast

Any recommendations for head gaskets?. Standard Ford. Payen or uprated jobbie? Car is running 17psi, 190bhp & 222lbft. No plans to increase power further.

CheeRS