I don't know. I don't even know if the guys at the machine shop would know off the top of their heads. I do know that a small block Chevy will weigh a lot less than, say, an FE (390) Ford. I can hump a small block off the floor onto an engine stand but I ain't a gonna try it with the Ford! You can mix and match your weights once you can find out the difference. When I was a kid I hung out with dirt track racers. This was back in the day when most racing equipment was home made. There was one guy who couldn't keep the tail end of his car nailed down. He finally worked his way up to a 8v71 Detroit diesel crankshaft chained across the rear frame rails to get it to handle. He spent a day or two working his way up through various car and truck parts until he found the right weight to make it work.
