I wrote the thread about the steering shaft rubbing my headers. I would really like to try some long tubes. Has anyone had or know someone who has longtubes and do they rub anything? How tight a fit are they? I know they make a little more power.
I gained 1.3x mph with a freshly rebuilt 302, bbk longtubes over shorties, and my Eddy lower ported. I do not think much, if anything gained was from the longtubes.
I had to lift up the engine about 3-4 inches, and they are definitely harder to install than shorties. If your looking to gain more power, I would look somewhere else, if you have shorties. If you have stock headers, I would go ahead and do longtubes, if you got the money.