big block codes

need help with casting #'s. went to mortec.com my number was not listed. 353049 big block chevy motor there is also B2476 which it said was Feb.24 1976. also GM7T Thanks for any help.

 

I couldn't find that number using a couple of different sources
one is here
http://www.ajgeneral.com/bbc_block_casting_numbers/

It appears that it should have more numbers on it. That is the casting number on the left rear flange on the block behind #7 cylinder isn't it and not a stamped number on the pad on the front of the right bank?

I had to hunt but 353049 is the casting number for the *head* not the block for this=
353049.....73-84...oval...OPEN...454, 122cc chamber, 255/119cc ports

found here in the big block cylinder head section
http://www.mortec.com/bbc.htm

 

Why do chevy guys just ***ume that when they say big block or small block everyone will just know it is a chevy? This has irritated me for years!!!!

 

looks like a cylinder head casting number... following from a high-perf web page...

540 Big Block Chevy Engine - Godzilla Rat



<TABLE cellSpacing=3 cellPadding=2><TBODY><TR align=middle><TD colSpan=5>APPLICATION-SPECIFIC PARTS: GM OVAL-PORT HEADS</TD></TR><TR><TD>Fel-Pro</TD><TD>Header gasket set</TD><TD>1.88x1.88 square ports</TD><TD align=middle>1410</TD><TD align=middle>1</TD></TR><TR><TD>Fel-Pro</TD><TD>Intake gasket set</TD><TD>Embossed, steel-core laminate, oval-port, 1.82 x 2.05 x 0.060, no heat</TD><TD align=middle>1210</TD><TD align=middle>1</TD></TR><TR><TD>GM</TD><TD>Cylinder head</TD><TD>Iron, 2.06/1.72 valves (used, supplied by Cylinder Head Exchange)</TD><TD align=middle>Cast 353049</TD><TD align=middle>2</TD></TR><TR><TD>Lunati</TD><TD>Valve seal</TD><TD>For 3/8-stem valves and 0.530-od guides</TD><TD align=middle>78385</TD><TD align=middle>1 set</TD></TR><TR><TD>Manley</TD><TD>Exhaust valve</TD><TD>Pro Flow, 1.72 head, 3/8 stem</TD><TD align=middle>11517-8</TD><TD align=middle>1 set</TD></TR><TR><TD>Manley</TD><TD>Intake Valve</TD><TD>Race Flow, 2.065 head, 3/8 stem</TD><TD align=middle>11514-8</TD><TD align=middle>1 set</TD></TR></TBODY></TABLE>

 

thanks to all who spent a moment helping me out. ajmopar, no offense intended. I was more worried about the info i was going to post.

 

It's a secret society, we throw out a code number and other society members automatically decode it.

I know a batch of Mopar freaks who are way more into it than we are though.
They are either racers or chalk mark restorers though.

 

now for part two---- on the p***. side front of the head on the pad is C8B115763