Hi lork, and welcome to the site. I notice you are from Pennsylvania and wanted to ask where exactly is Charleroi located? I'm also from PA and live in Glenville, about 50 miles south of the capital Harrisburg. Always interested in finding other owners of these trucks and how long have you had your 81 and is it 2WD or 4WD? I saw in your other post you said you have two 2" diameter exhaust stacks on your truck. That's gotta look cool and have any pics? For finding a turbo you will have to look for one for an 86-87 Isuzu Trooper or Isuzu PUP as they had the turbocharged version of the engine in your LUV from the factory. If you can get the intake manifold, exhaust manifold, and turbocharger off a factory turbo engine then you are set. It pretty much will bolt right up to your engine under the hood of your 81 LUV. A good website to go to look would be
http://www.car-part.com Hope this helps and I appreciate your reply.
Salvy