You could check with your local GM dlr just to see what kind of deal they'll make. Don't tell them it's for a Trooper though, tell them it's going in a 1985 Blazer or Jimmy 4X4. That way they won't get their Knickers in a Knot about using the motor in a TBI application. Don't pay any attention to the GM legal-ese regarding this motor not being rated for TBI use, it works just fine with a few 'tweaks' and probably burns cleaner than any old 2.8 (as long as all the emissions controls are retained and functioning correctly).

Here's a few places to check out online, maybe one of them is close to you, saving shipping charges:

http://www.gmpartsdirect.com/results.cfm?singlepart=1&partnumber=12363230

http://www.crateenginedepot.com/HT-34-V6-Crate-Engine-S10-Truck-Repower-12363230-P25C2.aspx

http://paceperformance.com/index.asp?PageAction=VIEWPROD&ProdID=22494

http://69.20.48.158/browseproducts/12363230-HT-3.4.HTML

http://www.jegs.com/webapp/wcs/stores/servlet/productitem_10001_10002_761681_-1_377538?CT=999

http://www.sdparts.com/product/12363230/34LHTV6GMCrateEngineAssembly.aspx

Here's another GM site with more info, including a dyno chart:

LINK

Plug your Zip Code into the dlr locator to find the various dlrs in your area.

BTW, if you haven't already asked for the packet of swap info, send me a Private Message with your e-mail address listed and I'll forward the files to you.

HTH..........ed