Slant 6 Turbo 68Dart Project

Has anyone ever used this? :
http://www.jegs.com/i/Dynomax/289/53090/10002/-1?parentProductId=2853338

I'm thinking of that for coming directly off the exhaust downpipe flange, that way I can tack everything together, and my thought is I can put a spot weld on each individual rung to keep the pipe in my desired shape... but maybe it doesn't work like that. Then I'd just wrap it with header tape, and then put a 3" to 2" reducer on the end and clamp it to the old exhaust till I figure out a real exhaust system for the rest of the car. I'm thinking ultimately side exits.

Reason for flex stuff is I want to try and find a shape to come back across the J manifold and go out the back without interrupting anything or leaving the exhaust too high in the engine bay for a long distance.

Today I'm also likely going to install the oil drain fitting, and the dump line. I'm thinking about 1" below the top of the pan, directly in line with the turbo should do it. Being -10an I'm assuming it will have no problem bailing oil. Not going to be 45* though.