I had one 440 block bushed years ago, my new Koleno block is bushed. I've built and raced lot of different Mopar V8 motors over the last 40 yrs and I had several loose oil pressure due to valve train failures, some of them needed several rod bearings replaced and some didn't after inspecting them . If it wasn't so darn expensive to have them machined and bushed I would do all my motors that where going to be raced I do try to measure how much clearance from the lifter bores to the lifters it has, if it exceeds .0025 I don't use that block for a race motor Mopar use to sell oversize (both hydraulic and solid) lifters but not anymore that I'm aware of
What time and price are your local machine shops quoting you? I'm almost positive I paid a little over $900.00 total for that 440 block back in the early 2000s to be done. Your choice