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I just wanted to share some info on the NNBS fuel rails that I stumbled across with a stroke of luck. When I switched to a TBSS style intake I had to use the matching flexfuel injectors but I ended up maxing them out. My 72# injectors were NBS and just a little short so I would have had to modify the mounting points or use spacers and longer bolts for the rails. I ended up breaking the 4an fitting off of the rail so I had to order a new one and randomly enough it had longer cups (see below pictures) so I was able to swap in my NBS injectors. I took a picture of the part numbers to share, the first two are for NNBS injectors with a short cup and the second two pictures are the ones with a longer cup. I don’t imagine this is a hot topic anymore but just wanted to share the part numbers for anyone that ends up googling this for their swap.
NNBS Fuel Rail Info 
