I would try the forum on the Daihatsu drivers club pages on the following page:
daihatsu-drivers.co.uk
Check this information from the same site:
HEAD BOLT TIGHTENING SEQUENCE
OK, since I've got the book with me, I'll give you the head torquing sequence.
The best thing to do is to make a sketch of the head bolts as you look at the engine from the front of the vehicle.
There are 8 bolts outside the rocker box on the injector side of the
head in a line from front to back. Starting at the front, label these
bolts 14, 10, 6, 2, 3, 7, 11, and 15.
There are 5 bolts in line from front to back, directly under the
rocker shaft. Starting at the front, label these bolts 17, 9, 1, 8, and
16.
There are 4 remaining bolts in the rocker box in line from front to
back, above the exhaust and inlet ports. Starting from the front, label
these bolts 13, 5, 4, and 12.
You have now drawn yourself a picture showing the tightening sequence for the head bolts.
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The torque setting is 117.7 +/- 9.8 Nm (Newton metres)
NOTE THAT BOLTS AND BOLT HEADS SHOULD BE OILED
To get foot pounds, multiply Nm by 0.738
I actually torqued my head to 70 Nm, then 95 Nm and finally 120 Nm.
Hope helps.