distributor drive gear bush/vertical drive gear for camshaft

The Haynes manual says to fit the grubscrew to the small hole on the distributor drive gear bush as it faces the oil filter mounting face. The small hole has a channel running through it, but the grubscrew does not fit and extends beyond the face of the oil filter mounting face. However, the large hole fits the grubscrew but is at a different height relative to the engine block and seems to throws off the alignment of the master spline a bit according to Haynes manual. The small hole seems to be aligned better and the drive gear rests all the down in the block. Which hole is proper? Also, is it possible the distributor drive gear bush can shift position relative to the gear on camshaft?

Philly,

IIRC there is only one of the holes threaded for the grubscrew, the unthreaded holes are oil passages. It should be the smaller hole just below the top stud. When properly screwed in it will not protude and is behind the gasket. Yes, the drive gear bush can spin on the gear. If you position the grubscrew locating hole just about 1/8th turn forward when the drive gear assy drops in the whole thing rotates into place and the hole(if you are lucky) lines up. If you can look in with a flashlight and use a piece of wire to then line up any visible hole in the bush.

gene

Thanks.