wot gearbox should be on a nova gte?

[kane]

i have juct bought a nova gte engine and box but the box wont fit. the box is an f13. is this the right one. if not i have an f15 aswell but wasn't sure if i could use it. the f13 bell housing will not fit over the flywheel so cud the f13 internals go in2 the f15 bellhousing?

[Adam]

If it wont fit then its a f10 as it has a smaller bellhousing
F13 and F15 are both the same fitment.