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Fuel Rails
Ok her we go
The distance from the top of the manifold and the inner most injector boss is a little less than 3.5 inches.

Next picture is the bottom of the manifold s injector bosses
The measurements for the steps starting with the biggest going to smallest  are 7/32, 3/8, and 1/4.  I am wondering if I can enlarge the injector bosses to 7/32  so that the injectors will fit without damaging the manifold?

Here is a picture of the injector inserted in the manifold
I fits great a very tight seal a little hard to get in but it went with a little lubricant.

Here I did a mock up out of some wood I had laying around
Those engineering classes finally came in handy.

I also have some questions on the fuel inlet diameter I thought of using a 1/2 to -6an fitting but the inside diameter is only 1/4 inch is that enough fuel flow for the rails.

Let me know what you think.  Damn it I am a construction worker if I can do this in one day what is the hold up?  You should all know what I mean.
Did so more work I took somebody advice on the bullitine board and used some dowels to mock up as injector and rails.
The above picture is the mock up that I did.  Ok here is the problem with thist as the injectors are place at aprox a 40 degree angle the tops would overlap each other by about a .5 inch to each other.   The only way I could get the rail to fit correctly was to remove a half of an inch off of the top.  I think I have come up with a soulition but I would need to see for sure.