Oh, and thanks Marten for posting the picture. The LS engine I have is about 2" wider than a 350sbc from exhaust port to port, but the angle of the exhaust ports is more, so it may be a bit more work for me to fit.

 

Yes very confusing, and after I got them, well have to make them work. You may have to change your steering shaft route. Looks like you are as tight as me. I called them to see what I could get. First response was use shorty headers but after talking to them I went to mid length. I don't like the look of shortys and from what I read about headers there is very little difference in performance on header sizing and routing.

 

From the photo on the previous page (I don't quote photos to fill pages), it looks like you have ample space between the back corner of the engine and the firewall. This means you could probably build (or find) a long tube where the 1 and 3 cylinder tubes could go up and over 5 and 7, then down at the firewall.