ok so i got the casting numbers from the block and head, narrow it down to a 72-73 350 with 76cc combustion chamber, and it says it can be two or four bolt main.... but i also found another set of number, on a little pad in front of the passenger side head, in the block... two sets of number

12b680895

t0602ckd

i was just wondering if anybody knew what these meant before i go tearing any farther into this engine... thanks

http://www.chevymania.com/partsid/suffixresults.cfm

This one should actually work (no offense Chris):
http://www.chevymania.com/partsid/suffix.cfm?block=Small

Hmmm... that's where I was when I copied and pasted the url.:confused:

12b680895

t0602ckd

1 - Chevrolet division
2 - 1972 model year
B - Baltimore assembly plant
680895 - vehicle sequence number (first 72 Chevelle at Baltimore was 100,001); 180895th Chevelle series sequenced at Baltimore

T - Tonawanda engine plant
0602 - engine date, June 2
CKD - suffix ID code for L48, 350-4bbl w/TH350 transmission

thanks for all the help guys, i couldn't get those sites to work, oh well macintosh hooked it up... thanks again!

Hmmm... that's where I was when I copied and pasted the url.:confused:
I had trouble with that page copying also. The link I inserted was the "question" page and not the "answer" page.