[joyridin']

The front is definitely MGB. The brakes I think are maybe Ford or GM calipers with GM rotors? I am not an MGB expert, but I believe the original MGB had solid front rotors.

The gas tank looks kind of correct. Mine is a lay down style, but I have seent he style you have. The gas fill tube is usually right behind the seats in the center. If you look at Donunder or 750HP pictures, they both have Arntz and see where their gas inlet is at.