I'm trying to figure out which engines I got with my '51 Chev pick-up. I found the serial numbers just behind the distibuter on both but I can't find anywhere on the internet to i.d. these. Any help would be great. I also have a SBC I'm just waiting on the phone call with the numbers so if there is a good site to check these myself please let me know.

First one in the truck is: 425268
Second spare engine is: x486534
both inline six.

Thanks,
Sean