BenC

That makes sense. I'll definitely get a new spindle. I was struck by how much just installing the distributor tightened up everything. I don't have "How to Modify Datsun 510,610, 240Z engines & Chassis" but I do have "How to Modify Nissan and Datsun OHC Engine" and was stuck with how much more technical information was in Monroe's book. Thanks again for the info. I'll buy a new spindle and see where that gets me.

I'll keep those sleeves in mind. 0.011" sleeves (adding 0.022" to the shaft diameter) would require machining the timing cover. If it was more worn out it might work! When I read "replace timing cover" I remember thing, "Yeah, how's that going to work?" Thanks for the info!

It is in "How to Rebuild Your Nissan/Datsun OHC Engine: Covers L-Series Engines 4-Cylinder 1968-1978, 6-Cylinder 1970-1984" http://www.amazon.com/Rebuild-Your-Nissan-Datsun-Engine/dp/1931128030/ref=sr_1_1?ie=UTF8&qid=1456679268&sr=8-1&keywords=how+to+rebuild+nissan+and+datsun+ohc+book I'm at work right now but I think it is on page 130. When the distributor, cover, and spindle are assembled the slop is not nearly so alarming but still present. When it is just the spindle and cover it wiggles around.

That is very helpful. I was not aware that either was particularly available. Where would one find a new timing cover? I have looked and not found any. Of course with Z parts it is often about looking in the right place. It seems like the kind of thing that could have a bushing installed if the center of the hole could be located.

I'm assembling an L28 using the timing cover and oil pump drive shaft from an L24. The shaft fits looser than I'd like in the timing cover. I measured the ID in the timing cover and the OD on the shaft and there is definitely over 0.005" clearance. My inside snap gauge for this small a diameter is a POS but the clearance is certainly no less than five. Specs are replace timing cover above 0.006" clearance. A lot of money and time have gone into this build and I don't want to screw around with iffy timing having this shaft be loose. What are folks doing when they encounter this problem? This is not my first motor but it is my first L28. Thanks!