Stock 1989 318 w/ 48k Miles - Rebuild Recommendations

Thanks everyone for commenting so quickly. I know it's not an A body, but this engine is going into a 91 D150 with a AX15 for now. If it gets more than 5 to 7k miles a year I would be surprised since this will be a weekend truck or used when my 2014 Ram eats another set of lifters. I just want to get it running, stop the rust, and give it a decent paint job. Being able to not dive into a full overhaul or refresh really helps. Keeping the heads on will be nice too. I'd like to save the internal engine stuff for when my son grows up. I hoping he'll want to spend time together in the garage instead of being attached to video games.

Do you still recommend removing the old freeze plugs and replacing with brass or just removing the block drain plugs?

I've never used diesel fuel to clean an engine. What's the best method? I can always search through the forum and see if anyone has posted information on that.

I have been searching through this forum and others and always find this one to give better information with less keyboard warriors. Thanks for all the good information and the great how-to threads.