1967 tubbed C-10 build questions *HELP*

[67whitley]

I am building a custom 67 truck from scratch and need help. The front frame clip is a 70 camaro, the middle is truck frame, and the back is a four link clip all spliced and boxed. My question is I need to weld in a transmission cross member. Is the engine suppose to sit level or sit so many degrees tilted back? Also what angle does the pinion need to be? I need this info so I can custom make a drive shaft. Is a two piece with carrier bearing or one piece drive shaft better for drag racing? Need all the help i can get setting up the four link to make it hook. This is going to be a street/strip truck. Also how do you figure out what size rear gear and back tire you need? Im going to put a 402 bbc and turbo 400 in it for now. I cant remember what size tires is on it ill have to look. I know they are m/t sportsman series.

Thanks in advance Aaron