If I had to do it all over again, I would've NEVER bought my 1989 Ranger with the 2.9 engine. That engine is a junk design if you ask me. I went through 5 cylinder heads on it, and two radiators from the compression making them leak (I'd guess), then swapped it out for a Jasper rebuilt. Now it has another cracked head.
Your luck may be better than mine.