So in researching my l28et swap since I have a 81 I've been looking at distributors and oil drive shafts. I see that D21 trucks use a similar distributor. They are longer however but also use a turbo style spline shaft. Because they are longer the timing covers are a little different, where the shaft comes through at the top the hole is larger so the end of the distributor can slide down deeper to couple with the shorter drive shaft. I think the l28 shafts are 9" and the z22/z24 are 6.75". Here's the rub, the z22 timing cover is taller because the engine block is taller. If you compare the two it appears as though you could maybe cut down the taller cover to fit a l28 and then be able to use the z22/z24 parts. The z22 distributors use an optical cas like the 82-83 turbo does. One could also get a drive shaft and weld up a longer one to be used with a turbo dizzy or maybe with a spacer and a z22 dizzy. I don't have any of these parts in front of me, I'm just going off pics. I also don't know about the cap and rotor fitment, will the turbo parts fit the z22 dizzy? Anyway my mind never stops turning, its hard to go to sleep most nights especially when I have a project that intrigues me. I am planning on a trip to the jy but they only have an 85 and I'm not sure it has the dizzy I need to look at. If this works it will solve the supply issue for turbo conversion and standalone guys. Give some thoughts gentlemen.