On my 207 in the '36 1 Ton, the pushrods are held in place with "hold down plates". After removing the bolts, the pushrods are lifted to reveal a "keeper" below the spring, and once removed the pushrod comes out thru the top of the head......I asume that you've discovered this...not sure about the lifters yet. It seems to me that my 207 had been left with open plug holes for at least a decade....So I'm looking for info/advice on installing a 216 or 261 in the mean time. (I'm a "one finger typer"--why are all the letters so mixed up on the key board?)