72' 340 Drivers side HP manifold vs older HP manifold
Well.....it just so happens that I sell these manifolds. That's not why I chimed in, I was simply trying to help you out. To answer your question, a good set of original 340 manifolds (L & R) go for $450/$500 to $850 depending on who you buy them from. If you have a close friend you can maybe get them cheaper?? Finding a good set for $450 might take a while?? I've sold at least 30 pair of my manifolds to many FABO members. But to save everyone money I developed a method to take a 360 magnum (passenger) manifold and machine it out to the same size as a 340 driver. The 360 (passenger) magnum cost less and doesn't break like the old (50 year old) manifolds. I search all over the US for 340 driver and 360 magnum manifolds, buy them, machine the 360 magnum, sand blast paint, primer and top coat with high heat paint and sell them as a "pair". I also make the 120 degree down pipe for the 340 driver to clear the torsion bar.
As you can see in this first pic the 360 magnum can be machined out to a little over 2 1/4" which makes the exit hole the same size as the 340 manifolds"
Here's a pic showing the difference between a 360 magnum and a 318 manifold....believe me there's a big difference. They didn't use the 2 1/4" exhaust hole on the 340 6 pack engine because it "looked good"!!
treblig
Well.....it just so happens that I sell these manifolds. That's not why I chimed in, I was simply trying to help you out. To answer your question, a good set of original 340 manifolds (L & R) go for $450/$500 to $850 depending on who you buy them from. If you have a close friend you can maybe get them cheaper?? Finding a good set for $450 might take a while?? I've sold at least 30 pair of my manifolds to many FABO members. But to save everyone money I developed a method to take a 360 magnum (passenger) manifold and machine it out to the same size as a 340 driver. The 360 (passenger) magnum cost less and doesn't break like the old (50 year old) manifolds. I search all over the US for 340 driver and 360 magnum manifolds, buy them, machine the 360 magnum, sand blast paint, primer and top coat with high heat paint and sell them as a "pair". I also make the 120 degree down pipe for the 340 driver to clear the torsion bar.
As you can see in this first pic the 360 magnum can be machined out to a little over 2 1/4" which makes the exit hole the same size as the 340 manifolds"
Here's a pic showing the difference between a 360 magnum and a 318 manifold....believe me there's a big difference. They didn't use the 2 1/4" exhaust hole on the 340 6 pack engine because it "looked good"!!
treblig