1970 340 bare block

I've got a 1970 bare block. Standard bore, has been magged and will need to go .030 over due to rusty bores. One bore was sleeved. Block currenly is rusty but an easy airless shot blast away from machining. Pic is a year old so there's a little more surface rust. Asking $500 as is, $600 with it sonic tested. Casting date is 3/5/70, ID number under driver's head is illegible due to rust.