cost definitely outweighs the benefits, unless it's an '83-84 22RE where you can swap the oil pump drive spline, and order a timing set for an '81-82 22R.

on a later engine, just get a steel rail kit and forget about it.

'79 sport 4x4 longbed <img src="/forums/images/graemlins/smile.gif" alt="" />
20/22R hybrid with EB's OS valves, 268c cam, offy intake, weber 32/36, thorley header, 5 speed swap, 34" LTBs, downey 3" springs, marlin hysteer, 4.88s and locked

'91 4x4 shortbed
22R-E, W56, the dd!