-there's a ground going to the old high pressure pump, I grounded it since it seemed like a smart idea. The Hot wire there you will want to cap off and keep protected from shorting out on something.
-feed a high pressure fuel line down from the back seat down the tank towards the exterior fuel pump. you want to run a high pressure line to mitigate risk of bursting the low pressure one. this is VERY easy, i dont understand why people struggle here.
-I bypassed the two fuel pulse whatevers by the exterior pump and just went directly into the hard line, no difference noticed.
-the fuel injector line i used fit on the hard line but not the outlet of the fuel pump housing. a step down hose is needed. or if you're creative and like risks, take the old low pressure hose, and cut off about 5 inches. then feed a piece of the high pressure hose into the low pressure hose piece (about half way) enough that the low pressure hose can go back onto the fuel pump outlet tube and that the high pressure hose butts up against the tube. you should then fit a male to male adapter into the fuel hose going down the tank and into the new double layered hose. you want to use the adapter so when you put a clamp on the double layered hose it can actually clamp the two hoses tighly without collapsing them. clamp all the ends of hoses. Or you can do the smart thing and just get the two sized high pressure hose and avoid this mess.
-the fuel pump i had was very similar to a walbro (i think same size specs) and the early fuel pump housing does not have the bracket holding it on the bottom that you are to trim in the later models. instead if your pump hits the bottom of the tank and you cant bolt the top down, you need to remove (in my case just under an inch) some material from the tube the fuel pump feeds into. I used a hack saw and then a file to dull its edge. the hose that connects the two burst after a short while so use some high pressure hose that wont dissolve when immersed in gasoline. clamp these down tight and make sure your pump isnt sitting on the tank but is close.
-wiring is pretty straight forward I cut soldered and shrink wrapped my new hot wire and grounded the pump to the return tube.
-the whole thing is pretty wobbly since there isnt anything holding it together besides wire and a hose, so use something to keep the unit tight against the drain tube. zipties i wouldnt trust in gas for too long, but using too big of a hose clamp may make fitting the unit back into the tank difficult. use what you've got.
obviously do any cutting, soldering, shrink wrapping with the pump out of the car and preferably in a different room so you dont burn your car down, or yourself. just some notes for us early model guys.
Here's a picture of my fuel pump mounted to the early assembly, I believe it was prior to me cutting a little off the tube that the hose fits onto.
20160111_123724 and here is the Early model in tank fuel pump setup, the larger Diameter hose on the bottom is the feed going into the engine, and the small diameter hose with the bend is the drain going back into the tank. the Early model fuel tanks dont have the drain like the late models.
20160111_103843
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