I also believe the F-104 design was modified with a reverse vertical stabilizer, using the forward slanted wings, they called it the X-27 Lancer. they also installed a larger and better engine. (General Electric J79) This was a much better design and stability problems inherent of the F-104 completely disappeared. They hoped this version would be ready for production by 1972. All in all it was a dream to fly from test pilot reviews.
Dihedral is when the root of the wing is lower than the tip of the wing. The more dihedral, the faster a plane snaps back to horzontal flight after being rolled to one side or the other.
It’s similar to rake and trail on a motorcycle...the way it afects handling.
Actually the F-104 used the J79. The Lancer was to have the Pratt&Whitney PW1120 - basically a small fan F100 designed to slot into the same hole as a J79, but with thrust intermediate between the J79 and the F100
The PW1120 was contemplated for reengining a lot of 70s aircraft; McD F-4 and IAI Kfir among them.