Sleeves? That block has been sleeved? Or do you just mean the cylinder walls?
You can buy cylinder components in .010" increments if you wanted to "save" the block for more rebuilds, but from what I found when having mine built, I don't think machine shops feel confident enough in having .010" come out right. Personally I would have liked more cylinder wall than less, but hey, they'd only do .030", thats what I was stuck with.
Pretty happy with the way my build turned out. If I were to do it over again, I would have got a later 1 piece roller 350 block to work with. (this if you have ideas of a roller engine anyways) Stock roller cam saves you some money over aftermarket (I wanted a roller) and frees up some power. Plus one piece rear main motors are less leak prone. Looks like this is your '89, so that would be a no-brainer conversion while you had it apart IMO. Fairly cheap "hop up" when you'll need a new cam/lifters anyway.
Speedo-Pro Hypereutectic pistons I think $100, (9.2:1 compression with 64CC heads) free Eagle H or I beam rods (whichever are not more race oriented as you can tell I really didn't care as long as they were supposed to last in a high mileage engine) thanks to the engine shop losing my stock rods, can't recall crank bearing manufacturer, perhaps Clevite, one piece oil pan gasket from Fel-Pro, "stock" thickness Fel-Pro head gaskets, Complete stock (originally, pulled all the studs and went with ARP) Vortec heads, ARP head bolts, Cloyes "true" (what the heck does that mean, theres a fake one?) double row/roller timing chain, Comp Cams Pro Magnum roller rockers, and Hedman Elite headers. Balanced. Pretty much all I can think of right now.
Look at heads and see if you can find any that work with your TBI intake, and compare price. Lots of good heads out there, the TBI truck heads suck for power, a true, complete rebuild of a set of heads around here is $300+, so some types/brands of aftermarket heads aren't too much of a stretch. It's been proven time and again that those TBI heads are easy to improve on, even a mild aftermarket head would net some impressive results. Vortecs are nice, but a lot of work on an injected motor, I say stay away from them.
I'm very pleased with how my motor runs. Once I get all the rest of the pieces back on the truck, I will start tuning the injection system to get things "perfect". Still runs great, and I've been told by others that have put together engines and vehicles themselves that the motor in this truck moves it very well. I'd like to dyno it to see what kind of numbers I make, but again, that's after I get the injection system tuned correctly.
Well, the pistons and sleeves are real scarred up. The cam bearings alook like they've been sandblasted. The main bearings look like pin striped suits and the crankshaft has more grooves than Rick James. 
