Hi gearhead,here goes,the engine was rebored,new bearings etc last winter,only done about a thou miles since,lifters were stripped cleaned,pump stripped cleaned,(air leak in there??)all lifter springs felt and measured the same,all were reassembled as a set i.e. same body to piston, spring,cup.I've set the lifters up so that the valves are shut but with a little pressure on the lifter,engine and oil hot,not had a chance to drive it yet as they've started trowing grit on the roads,getting chilly \:\( sollid lifters,will I need to change cam?Talking to a fellow stovebolt owner at a swapmeet('56 rod) came away with a short engine(less head) \:D \:D just have to take some beer and simply remove from chasis,body work removed ;\) so I have a spare set of lifters,oil pump and a crackin door stop. Oh yes what oil should I use ?? I'm useing a very good 20/50 synthetic should I use a monograde