83-84 came with 22r but the blocks are slightly shorter(not interchangeable with 85+). 85-95 22r (and 22re) blocks are all interchangable.
I know this because I kept ordering stuff for an 83(my truck was an 83), but some previous owner must have done an 85+ motor swap(just block and head) so after trial and error I found out the engin blocks(mainly timing chain) and some heads are not interchangable.
