I think the blow through carb is for a budget minded racer. There is no way it can even come close to an EFI setup. Especially when it comes to individual cylinder corrections, wideband air fuel adjustments, timing maps, etc etc etc
My question is why on a buildup that has plenty of $$$ tied into it would someone do a carb setup? Especially when its touted as 1 a street car(meaning he wants drivability).. 2 as a pump gas low octane application(meaning timing and fueling maps are more critical).
Maybe its the owner doesnt want to deal with a laptop? Or learn to deal with a laptop to get the motor trimmed out? Cant be he's afraid of computers or he wouldnt be posting his build on the net.
I've had both.. went through plenty of motors on the blow through. My current EFI setup.. over 180 passes.. still rocking. Would never in my life again make a pass without a datalogger.. never go back to a carb... because when that motor comes apart getting figured out.. there will be no way of telling what happened when it let go.
I wont even get into the 50/50 water injection choice