Yes, all the Stovebolt's are that way as well as the GMC's,Straight 8 Buick's and Straight 8 Pontiac's, must have been a GM corporate thing in that era. Also, all 4 housing bores in the block are also a different inside diameter as well, just as the crankshaft has 4 different diameter main journals, making line boring a job most shops don't want to mess with.
