[RICK LAKE]

Rawkkrawler, Mike you may not like this but the ONLY way is to pull a head or have the motor pumped. I do believe that 427 motors came with and without side bolts for the main caps of #2,#3,#4 of an FE block. There is a test for removing a water jacket plug and see what drill bit you can stick between cylinders. Some motors have the CID of them inside one of the holes from when the foundry forged the blocks. I have seen and have a 410 with 4 bolt main caps in it. This was before a started to learn about these motors. This motor was to be a 428 with 427 main caps. It turned out to be a 390 block and 428 crankshaft. By the way I have a complete set of caps from a 427 block. Pull the head and you will have the correct bore and stroke of the motor. Rick L.