I would guess that if there is a knock involving a rod bearing, there is damge to the crankshaft which would require removal to fix. As you will find when reading the posts, the 235 is a natural almost "dropin" replacement for the 216.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!