Manifold questions
The 340 120 degree "flat flared" down pipe with 340 flange adapter sells for $75 (plus shipping). Each one is hand made. The 360 "bell flared" down pipe with flange adapter sells for $30 (plus shipping). The 340 down pipe is pretty short, I make it so that you can clear the torsion bar without choking down the pipe, I use 2 1/2" mandrel bend pipe. It's not very long. Any muffler shop can make the rest of the piping on the driver's side. The only place they have problems is where the pipe needs to clear the torsion bar, so I make that part. The only way a muffler shop can make a piece of pipe that will clear the torsion bar is by crushing the pipe so bad that it cuts off the flow. Since the 340 requires a flat flare so close to the super sharp bend most muffler shops can't make it at all.
The 360 down pipe can be from 12 inches to 18 inches long. The driver's side 360 manifold down pipe is very accessible and any muffler shop can make good flowing pipes because there is plenty of room where the 360 manifold exits.
In the case of my '69 Barracuda, I bought a section of mandrel bent J pipe and cut and welded it in place coming off the 120 degree 340 down pipe. Then I removed it and finished all the welds. The passenger's side was much easier.
treblig
The 340 120 degree "flat flared" down pipe with 340 flange adapter sells for $75 (plus shipping). Each one is hand made. The 360 "bell flared" down pipe with flange adapter sells for $30 (plus shipping). The 340 down pipe is pretty short, I make it so that you can clear the torsion bar without choking down the pipe, I use 2 1/2" mandrel bend pipe. It's not very long. Any muffler shop can make the rest of the piping on the driver's side. The only place they have problems is where the pipe needs to clear the torsion bar, so I make that part. The only way a muffler shop can make a piece of pipe that will clear the torsion bar is by crushing the pipe so bad that it cuts off the flow. Since the 340 requires a flat flare so close to the super sharp bend most muffler shops can't make it at all.
The 360 down pipe can be from 12 inches to 18 inches long. The driver's side 360 manifold down pipe is very accessible and any muffler shop can make good flowing pipes because there is plenty of room where the 360 manifold exits.
In the case of my '69 Barracuda, I bought a section of mandrel bent J pipe and cut and welded it in place coming off the 120 degree 340 down pipe. Then I removed it and finished all the welds. The passenger's side was much easier.
treblig