With no money for a wide band O2 meter or dyno runs, just use the 8/1 FMU. Even I'm using one till I get my othe rpieces together for the big boost. You only use stock injectors with the FMU though.
The whole project can be done for under 2grand if you buy all used parts and are a big DIY kinda guy. Home Depot and Ace Hardware are your friend. Use 2" intercooler piping from Summit and you can use radiator hose for weird nebds as well as pipe connectors, which saves you quite a bit by the way. For a low boost you don't need Tbolt clamps, just make sure the end of each IC pipe has a weld bead or some JB Weld applied to give the hose clamp somthing to bite on, I ran 28 psi in my Skyline just like this.
If you've got access to tools and a welder your golden. Best of luck, if you need and other help post away or shoot me an email,
[email protected]