Would those headers even work in a A body? A pick up may be.The headers are the shortest leash on that dog.
Would those headers even work in a A body? A pick up may be.The headers are the shortest leash on that dog.
TTI, Dougs, Hooker, (I'm sure there are a few more.)What are the header options on a ‘65 a body now? And yes, 100 octane leaded premium was the norm, with the Sunoco 260 at the adjustable octane pump being full on 104 octane capable of supporting 12.5:1.
TTI, Dougs, Hooker, (I'm sure there are a few more.)
Maybe, or june.So what are the chances that a 70 swinger 340 would have J heads? If it was late production, like May 5th.
The headers that laysons carries flow well? I remember DVJ cuda had some on his tunnel rammed cuda and ran very well. I guess my question is are these about as good as the equal length type headers?Headman, Even the ones made by Harold (now sold by Laysons)
Why? When 340, 383, 413, 426w, 440 and hemis came from the factory wirh 10 to 12.5 to 1?
no 340 came from the factory with 10:1 compression.The factory ratings allowed you build to 10.2 or 10.5:1 to be NHRA legal. An early 340 with stock 71 or 72 cc X heads when new was around 9.6:1 or a little less.
I don't think an iron head, 10.1 : 1 340 would run very good on 91 or even 93 octane.
I would say may be to the flow. They are tubing headers and probably flow about as good or a little better than the 67-69 HP 340 manifolds. I was never a big fan of where they exit. Look "Spitfire" up in the search box. There's lots of threads and info about them.The headers that laysons carries flow well? I remember DVJ cuda had some on his tunnel rammed cuda and ran very well. I guess my question is are these about as good as the equal length type headers?
I've never seen a 70 340 Dart with factory X heads, not saying it didn't happen just I never seen one. Every one I have ever seen has been J,U or O.So what are the chances that a 70 swinger 340 would have J heads? If it was late production, like May 5th.
My 340 swinger came with X heads it was produced in the 11th month of 69, and I believe a big reason that the x-head is more desirable is just because of the reputation of the 340 when it came out. It was still strong through 71 but began to fall off after that and still use the Jhead some people associate the lower numbers to the J head my belief is they are equal with 202 valvesI've never seen a 70 340 Dart with factory X heads, not saying it didn't happen just I never seen one. Every one I have ever seen has been J,U or O.
My 70 swinger came with J heads. For damn sure.I've never seen a 70 340 Dart with factory X heads, not saying it didn't happen just I never seen one. Every one I have ever seen has been J,U or O.