I researched the same issue last year. I am (and at least one other) are going with an entire driveline swap. LS1/Chevy parts are cheaper and easier to find. Just my two cents...
Sam
Ya that's what I was thinking about, but I think I'd go with the LM4, aluminum block still to save weight but doesn't bring NEAR the money the LS1 engines still do lol. I'm thinking about a 5.3/4L60E combo with a Dana 300 off the back.
1999 Isuzu Vehicross-#1209- lots of mods - gone
1995 Honda Passport: Lifted, Locked, 34x10.50's, just a few things..-Click for build thread