I am documenting the conversion but other than a lot of questions posted on a number of forums, have not started a real build thread. This is a fairly common swap and has put a lot of quality Volvo's . . . and Jaguars back on the road. It has been awhile since I drove the car as an 83 HP diesel. I suspect a 240 HP V8 may feel a little different. I live in the Georgia mountains and can identify a couple of roads that were beyond the stall speed of the 3 speed auto with 4 people aboard.
Best I could determine only MAC and Ford Racing sell a shorty header specific to the GT40P heads. Anything else involved a ball peen hammer and strange plug wires. The MACs were ceramic for $310, the Ford Racing stainless were $249. Have the Ford Racing (M-9430-P50) on order from Summit Racing.
If anyone is interested, I will post back the build thread.