From the Tripod link:

Load capacity (kg) 8

From this random link about Pentax 67 lenses, the heaviest 165mm lens is:

SMC Pentax 67 165mm f/2.8 .. 0.835 kg

From Pentax 6x7 wiki, the camera:

weighing 2.3 kilograms (5.1 lb) with the plain prism and standard (105 mm f/2.4) lens

From the same lens link, the 105 f/2.4 lens weighs 0.59 kg, so your maximum camera + lens weight is: 2.3 - 0.59 + 0.835 = 2.545 kg. This is well within the load capacity of your tripod.

However the stability of the camera is also going to depend on the tripod head that you use. You will need to select a head with a suitable load capacity (and the weight of the head itself needs to be included in the total tripod load). While not absolutely necessary, a tripod head will allow you to easily aim the camera at your subject.

Finally I note that on that tripod link it says:

This product is no longer stocked and therefore cannot be purchased until further notice.

So maybe you need another tripod selection????