I wandered out of shit chat for a minute and look at all this tech. I read the whole thread and I actually saw this thing a year ago in person and the fab work is excellent top notch stuff. I think you need to find an LSA blower and a cam to match the rest of the bling, though!
I don't know if you did it yet, but there's no reason not to use the stock tank if fitment isn't an issue. Aluminum tanks just for aluminum's sake is not worth it. You could run a stock f-body pump setup in the stock tank with an adapter in the top like I did in my XJ, I think it's the same setup as yours. You don't need an external pressure regulator, either. I can send you a Solidworks file if you want to machine one. You should be able to do it in the lathe and a drill press or CNC it like I did
Did you ever come up with an engine harness/computer? And did you end up using that LS3 oil pan or test fit it?
You don't happen to have a blower for mock up do you
? I don't think it would fit with out reworking the top of the firewall and the cowl area that contains the wiper motor. Do you know how much taller it is than a stock ls3 intake? I have thought about going that route, or maybe a procharger unit, or in a perfect world I would plumb in a little rotary muffler in the passenger side engine bay. I want to quite this thing down as much as possible. Being bright ass orange and on 40's is going to be loud enough. Haha
I haven't test fit the oil pan, It's still in the garbage bag sitting on my shelf. Look at the corner table, bottom shelf, black garbage bag. I ordered a full kit from improved racing, F-body oil pan, windage tray, dipstick, pickup, and baffle. I think that will do the trick if the ls3 won't work. That is on the list of things to do before I start the engine. I have a 4l80 dust shield that I need to fit at the same time. I am not sure how that is going to go.
I decided on the holley setup. Full engine harness, dominator PCM, dual 02 sensors, fuel pressure sensor, 12" pro dash, the whole meal deal. If you are ever in the area, I'll buy beer and and pizza if I can pick your brain!