Brent B3B

I did the ones in my 1ton with the motor in the truck. 
https://m.youtube.com/watch?v=NVnDWdJrQBk&feature=youtu.be

if you drive them with the cam and tappets still in, you’ll need to break them off mid way. 
I used a vibrating saw to score them before I snapped them. 
and yeah, prep that baby like it is going into surgery ?
I plugged all the possible holes with towels, wrapped towels behind my work area and then I used tin foil to hold it in place.
 
oh yeah, I also bought a driver and setter

 
I was pleasantly surprised how much abuse that block took

I did the ones in my 1ton with the motor in the truck. 
https://m.youtube.com/watch?v=NVnDWdJrQBk&feature=youtu.be

if you drive them with the cam and tappets still in, you’ll need to break them off mid way. 
I used a vibrating saw to score them before I snapped them. 
and yeah, prep that baby like it is going into surgery ?
I plugged all the possible holes with towels, wrapped towels behind my work area and then I used tin foil to hold it in place.
 
oh yeah, I also bought a driver and setter

 
I was pleasantly surprised how much abuse that block took

Boy that is weird the book calls out a 13-53-4 for the heavy frame but doesn’t reference it for a part number. Doesn’t even show that part for the light frame. 
ken did you find a number on the old part yet? 

Hi Ralph, you are correct you'll need that key. I believe they call it a "woodruff key "
You could type it in as an internet search to see what your looking for.