There has been many posts on this through the last few years. Do a search & you should come up with a lot of info.
The clutch disc seems to be the biggest problem. The parts stores dont hardly sell mthe disc alone. The best way is to get a clutch shop to make one up. I havn't had sucsess with any of them around here though. If you are useing an 11 in clutch you can use one for a mid-late 80s Astro van. If it is a 10 in. you will need to get it made up. The last one I did has a 6 cyl. & 10 in clutch. I used the 9 in. disc from the S-10 & it works good.
With the elec. speedo drive you need to change the rear houseing & speedo drive gear with one from a mid 80s s10. Otherwise you will need an aftermarket electric speedo. There are converters available but they are expensive.
