Undersize crank/rod bearing

Any issues about using an undersize crank in a slant? It's got .40 on the mains and .20 on the rods undersize in a rebuilt motor I bought from a local machine shop. It was a stock-type rebuild in 1990 or 91 and has sat in inside storage both at the machine shop and here at the house since I bought it a couple of years ago. I do know it has a MP or maybe that far back a DC windage tray and double roller timing set in it.