mower,
Get a Suburban catalogue from
www.lmctruck.com. They have a new catalogue that has parts for the 88-91 suburbans. I'm not sure if the when GM changed to the doors but the catalogue from LMC should give you some idea on the details to make a conversion. I'm pretty sure the hinge mechanisms for the doors would have to fabriacated to the older style. I have not heard of anyone trying or doing the conversion.