Wind resistance MAY be a small part in what you are experiencing.

Torque induced turn is more likely the cause.

If you are able, try pointing the front of the engine a few degrees to the left (since it it turning right). This should counteract the torque and get it to run straight.

All my hulls are set-up so the engine starts out positioned on a neutral plane. ( zero degrees up/down as well as left/right in relation to the hull bottom) I then shim the engine in the pylon during the first several test runs to get it to run flat and track straight.

And as dadaddyro stated, it would also help if the engine were located a few inches further towards the transom. By the looks of the side view pic, the prop centerline is slightly forward of the hulls centerline. (it's that whole physics thing again) This could be cause for difficulty in steering on this type hull.