I found this while reading about a guy thet is putting a GM LS engine into a 1972 MGB (the pictures are his).  Looks like the basic kit runs $399 from Summit.  I was just curious to find out if anyone on the forum has had any experience with using the "legos" to help fabricate headers.

ICEengineworks 1750BASIC – ICEngineworks 1750 Series Basic Kits

I read up on this article in ls1tech.com also. I believe he has posted here a couple of times to. I think it would be a big help if you had to fab up headers to get all the angles right to fit a swap build. If I needed to fab headers, I would probably go this route myself.

Here is his build:

http://www.ls1tech.com/forums/conversions-hybrids/1016526-ls1-into-1972-mgb-gt.html

Hi James,

Totaly cool product.
I seem to remember something from years ago that used flexible hoses. You built your headers, exhaust system or coolant hoses from the corrugated hoses then froze them in place with expanding foam. You then sent them away to be copied in metal.
This looks like a way better idea.
Good eye James

Cheers
Fred

$399?  




We bent pieces of coat hanger...

It is expensive, but if you're doing some real tight fitting headers and plan on doing more than one set it would probably be worth the investment. They have a unique clamp system as well which allows you to clamp up the pipes leaving a gap where you can tack weld. Info on the mock up blocks at http://www.icengineworks.com/ and the clamps at http://www.vansantent.com/welding_accessories/ice_clamps.htm

Having built a few sets of Headers these would have been a great tool to have  Bar None!!

What I really wish is that I would have come up with the Idea and was selling some plastic Lagos for $400

Yes the price stings a bit

The clamps shown above look like a big help as well

So the next thing you need is a saw that cuts the curved sections precisely. Might be a little hard to find that, and if you could buy one of those for $400 it'd likely as not be a good buy. If you make enough headers to pay for it...

I always used coathanger wire, or welding filler rod usually but next time around I'll get some of that corrugated radiator hose like we had on the MG-Roadmaster. It holds a bend and is easy to shape.

JB