Re: Holley types?
2010 -2 barrel
4010 -4 barrel square bore
4011 -4 barrel spread bore
From what ive been told holley got the patents from ford when they whent to fuel injection there based on fords Autolite 4100 carb but redesigned to use holley parts and fuel circuits. I reckon its a great idea with only 1 gasket thats above the fuel level to prevent leaks,built in power valve protection.The problem is holley has stopped making them for a few years now due to them not looking like a holley and not being accepted by the holley mob.
Some parts like the removable booster venturis which also have the fuel inrichment nozzles are supposedly getting hard to find as you have to drill the nozzles when increasing the fuel shot.which makes them usless if you want smaller .So these need to checked before buying one.
Ive got one that i plan to use and once its tuned for the engine it should be good for years of leak free use.