S.S. Fuel Line Replacement by Clay ?????, My math may be screwed up here Options

[914forme]

I have been reading and gathering the items to replace my plastic lines with SS, my plastics are real bad.

So I read Clay's nice documentation on how to do this. I get me some nice pieces of SS tubing today, come home. Look at my stuff and go DOAH!

Clay calls for 7/16" line for the main pressure loop and return loop. So I am wondering if the number got messed up.

I grab my calipers and start measuring

Fuel log, pump, and pressure regulators = .3271 okay this is about 8-mm makes good sense now.
3/8" line = .3750
7/16" line = .4375

So it looks to me I should have bought a few sticks of 5/16" line which is .3125 or 21/64s (yeah right) which is .2813

Or am I just smoking crack here (IMG:http://www.914world.com/bbs2/html/emoticons/screwy.gif) and this will work?
Or maybe all 3/8" line and make the hose stretch just a little.

(IMG:http://www.914world.com/bbs2/html/emoticons/headbang.gif)

(IMG:http://www.914world.com/bbs2/html/emoticons/welder.gif) and braze new ends onto the lines and build me some new fuel logs

Just wondering Clay is a great guy just thinkin I may be nuts.

Stephen