Lets discuss headers!

[httrdd]

I am going to custom build long tube headers for my eg33 swaped LGT and I need some info from you guys. So far I found out 1 5/8 tubing is good for stock cams, but will it be good for milld grind cams? I saw the way Svxfiles did his bends and they look realy goood and tight to the body. Next question is how do you calculate fluid dynamics? Is there a certain length these header pipe have to be to flow correctly? What size outlet out of the collector would be the best for n/a? Thanks.

TJ