Long tube Swap headers for 88-98 trucks

[motoxlifer]

Been doing some reading and it seems I'm not the first person with this idea. But what I've learned is BBC header primaries are spaced on 5" centers, while LSx are on 4 3/8" centers. There are LSx flanges on ebay from $60-$90. You can weld one primary up to the flange without modification and then the others would only need to be manipulated by 5/8". I don't think that would be too hard,you could probably move it that much by hand, clamp it, tack it in place, and then weld it up. That's my theory anyway. So who's gonna be the first to try it .

[RedHeartbeat]

<div class='quotetop'>QUOTE(motoxlifer &#064; May 30 2006, 11&#58;14 AM) [snapback]54285[/snapback]</div>

Been doing some reading and it seems I&#39;m not the first person with this idea. But what I&#39;ve learned is BBC header primaries are spaced on 5" centers, while LSx are on 4 3/8" centers. There are LSx flanges on ebay from &#036;60-&#036;90. You can weld one primary up to the flange without modification and then the others would only need to be manipulated by 5/8". I don&#39;t think that would be too hard,you could probably move it that much by hand, clamp it, tack it in place, and then weld it up. That&#39;s my theory anyway. So who&#39;s gonna be the first to try it .
[/b]

I would try it but my bank account is dry right now. LS2 heads are punishing me.

[beertestr]

<div class='quotetop'>QUOTE(motoxlifer &#064; May 30 2006, 12&#58;14 PM) [snapback]54285[/snapback]</div>

Been doing some reading and it seems I&#39;m not the first person with this idea. But what I&#39;ve learned is BBC header primaries are spaced on 5" centers, while LSx are on 4 3/8" centers. There are LSx flanges on ebay from &#036;60-&#036;90. You can weld one primary up to the flange without modification and then the others would only need to be manipulated by 5/8". I don&#39;t think that would be too hard,you could probably move it that much by hand, clamp it, tack it in place, and then weld it up. That&#39;s my theory anyway. So who&#39;s gonna be the first to try it .
[/b]

An easier solution would be to start with FERD headers. The bore centers are spot on with the LSX engines, I have seen a few guys modify 302/351W headers to fit with pretty good success. I am not sure what they did for ports, i have feeling things were a bit shrouded, but they are a pretty good start.

I think you are the first volunteer