you may have more peace of mind knowing you have a brand new rebuild with a warranty, you can usually get them for under 1000. if you want to rebuild your engine yourself, hopefully you have some prior experience, or know someone who has. if you buy your parts from import engine parts wholesaler you can rebuild it for 700-800. That is if you dont get jacked on the machine work, find a good machinist. if your going that route you might as well get some high compression pistons, and a cam. i recommend ITM gasket and timing chain kits, pci timing chain kits, ROL headgasket and headbolts. I have not been able to find the 9.1:1 pistons in aftermarket. ITM, Badger, Silvolite, Wiseco etc..... do not make them. if you want to bore it over with 8.6:1 use ITM pistons. you can get the pistons w/or without ITM rings, Hastings rings are available.
edit: heres an ebay offering
http://cgi.ebay.com/ebaymotors...33615