The heads can be used out of the box...but can be made better, especially when trying to squeeze power out of a 36hp, every detail helps.
The exhaust ports on the WW Okrasa heads have a minor defect where the port is slightly offset, but the plus side is there is plenty of casting meat to correct it. Place your exhaust gasket on the head...I bet you'll see where the port is not centered on the gasket. This is why I decided to port/polish them and port match them to the exhaust system.
That cam really needs an 8:1 CR, so you need to set a tight .040 deck and reduce your chamber volume. With the WW Okrasa carbs, you may be able to get away with it, but you need the additional velocity/vacuum when running dual 2bbls
Just my suggestions from lessons learned.
You could always shoot for this beast...172HP - 36hp base: