SwiftV8

Not sure if you ever solved your issue, Just had to do a complete rebuild on my engine and found most of the parts through country cat and weber power. Unfortunately to do just the head gasket on these would still require engine removal to properly run the timing chain.

They will not rev over 4K unless the driver seatbelt is buckled.

I'm in the same boat myself, did you ever try the Havoc 1000 engine? I would assume we would need the ECU as well.