360 swap 1965 Barracuda

Thanks for all your input, and to answer your questions, yes it is a 71/4 rear, and no i do not have any parts yet. The one good thing about having a retired father is he can comb through all the junk yards, and the old abandoned mopars in his area (yes there are alot of abandoned mopars in the backwoods of Arkansas) of course i'm in Jersey so i guess he will have to drive them up to me. What else does he have to do? I just read the article on the 415hp 318 build in engine masters, very interesting. I am leaning to the 318, and since i have to change the rear anyway i should probably get the 83/4 just to save any changes in the future, if i decide to go with a larger engine, or do somthing different with the car. I just received the tunnel hump in the mail today along with the floor pans. The only tunnel hump i could find was for a 1966, any suggestions on how much i need to trim to make a good clean fit.