Not true you would still need the brass plugs and have to modify them for correct sizing and also block the emulsion ports off that do not need to be used. There is no performance difference between a fancy block or stock modified blocks. Read the carb gurus thread I posted. He says they are a waste of $$.
The one guy basically took his quick fuel block and modified it back to the earlier style emulsion air bleed and IFR package to obtain just about perfect a/f ratios all across he throttle band, idle cruise & WOT.
Only thing You have to do to these blocks for full adjustability is tap the IFR holes in the lower location. This would include the fancy billet block also. So they are actually the same with same mods needed but made out of different material is all.