The "848" head definitely indicates that it is at least a "235" later model head as noted by Bill H above.

Not saying so for sure, but this may indicate the numbers you have stamped in the block pad may quite possibly be a re-stamp for some reason.

Does this "engine" number show up anywhere on your title/registration documentation???

Maybe the picture attached below will help locate your casting code?

Does not require removal of the starter to find the expected 7-digit casting code.

Will wait for further updates.

Good luck in your search!!!
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Last edited by Gdads51; 10/10/2022 9:58 PM.
~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
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US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)