Hi Bob
The two bolts are hard to spot unless you know they are there here is page out of the 235-261 manual but they are in the same location on the 216. Any body who is interested I've posted the engine section of the later year 235-261 cu.in. Chevy Truck Manual US version on my web site
http://canadianmilitarypattern.com/1...e%20Manual.htm
Cheers Phil