thats a lot of work on a system that has an high failure rate. the spider system that your are talking about has a problem with the gas carbonizing in the poppet valves and causing them to stick. this happens when ever the vehical with the system sits for about a week or longer. also the regulators have a high failure rate. gm has put a 100k mile 10year warnte extension on those units. so i would recomend staying away from thoes. i dont think that a injector has material that can be threaded on it. you really need to sandwitch it togher. now you dont need to make rails. just make a sandwitch tab of some kind to hold each injector that will also retain your fuel lines on the injectos. then all you have to do is run the lines to a distrubtion block and fuel press reg. painless wireing makes a gm harness and a ford harness that you can use to wire up either brands fi systems on your car. so you can get factory reliablity. then you would want to get a chip burnt for the custom aspects of your motor. good luck.
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