$500-$600 is the going rate for a dyno tune! If someone is charging $1,000...RUN!!
As for injectors, etc...you can run anything you want but the the size of injector and pump will limit you. Back in the day, early 90's we were throwing on chargers from 5-10lbs of boost on essentially stock cars. Now it wasn't as efficient as it is today, but they all ran fine...But you need a tune!
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do you have a pic of your intake tube setup? when i bought my kit it came with the stock vortech tube (sc to tb) and a modied one that has a BOV provision that recirculates the air back into the inlet line. (if you can imagine that set up) the seller also have me a MAF housing but havent really checked it out and figured id use the C&L.
if you can show me your set up thatd be great.. i have heard of issues with the vortech set up out of the box... ill post pics of what i got.
Mine is a very early Procharger 600B with air to air intercooler. Blower is on driver's side, so plumbing is nothing like a Vortech. I redesigned it a month ago & only finished the fab a couple days ago. A lot of the plumbing is inside the fenders. Still working on FMU issue which will be resolved in another week or two. In the meantime, no WOT for more than a few seconds because it won't get more than about 50 psi fuel pressure with FMU removed. Good thing centrifugal compressors build boost slowly & the IC keeps the air charge temp lower.