You'll never get an exact F-style headstock, 70s or earlier, from a standard Pit Bull paddle because the pre-cut lower curve is too elongated, so it's always going to look slightly stretched. In this instance, there isn't enough wood beyond the top E string tuner hole to get just the right size of rounded bulb on the end of the headstock. And the tuner hole spacings will be slightly different as well.
But you can get something that looks very similar indeed and only real experts could tell at a glance it wasn't correct.
Plenty of online headstock templates in pdf form. Print one off at 1:1 scaling, cut it out and find the best fit on the paddle. For my GST-1 kit I stuck a template on with some paper glue after finding the best compromise position on the paddle. I then cut around that, sanded it down to the shape, and that was it.
Obviously with a 7-string paddle, you''ll have to make some slight alterations to the shape, but sliding it down to get the end of the headstock correct should then give you an idea of what slight mods you need to make at the nut end. But for that 70s look, you don't want to reduce the width of the paddle at all at the pointed end of that lower curve away from the nut. Just looking at a 70s headstock, the lower curve 'point' is roughly the same distance down from the nut as the width of the nut itself, and you've probably got that with the kit paddle. For a pre-CBS headstock, you'd need to reduce that distance.