My dad worked for over 30 years in an investment casting foundry in soCal. I spent a lot of Saturdays going to work with him. A machined designed by my dad and another engineer/employee was called the knock out machine. It used high pressure water jets first 1500psi from a .040" nozzle,( a second at 4000psi was available for shell castings). the Knock out machine would blast the investment off of and out of the pieces in minutes. To give you an idea of the range of the company the smallest pieces they made for the aerospace industry was some wave guide bends about 1/4 wide by 1/8" high inside,(tiny for the time, 1980's) the coolest was one with a 200deg bend that required no internal machining. We ( I worked there for about a year before I went in the USAF) also made a piece for Boeing that was basically a box,finished it was about 16" cube it required a mold that weighed over 500lbs. It was really cool the parts that came out of that small foundry ,including the pieces my dad was most proud of,made of Gold,contracted by NASA (most likely a sub. for NASA) and to this day still sitting on the Moon at all the landing sites.
Any way, it was said about 10 years ago how great it is to be an FE enthusiast now look what we have and what is coming,new roller rockers,different heads and blocks, Jays intake adapter and intakes plus covers valve covers timing sets not to mention the cranks,pistons cams,roller rockers,etc.. wow! A 100% FE Engine with no Old Ford Parts!