first time trying this, so here goes - i recently took possession of a 1977 chevy C20 custom deluxe. love this truck belonged to my dad until his passing, needs some work done to it - i will be doing myself. i know for a fact he loved tinkering with it all the time, pulling the engine out and possibly rebuilding it or swapping out. before i start buying parts for it for a tune up, etc. i would like to make sure what size engine this is and not assume its a 350 in the blind. so i located the number stamped on the cylinder head pad on passenger side front. did not see a series of numbers and letters so i got a second person to verify what i saw - 5503 and seemed to be partially machined off !! could anyone out there please help me ? thanks.
block casting numbers are visible probably with a mirror just in front of where the transmission mounts... there is also a julian date codes back there thats important.. (/)B147(\) would be b for feb... 14th of the month.. and since small blocks 350s were build from 68 thru 99... it could mean 77 or 87... depending on the casting number... the cylinder head casting numbers are between the rocker arm bases under the valve cover.. there are patterns on the end of the head... that can be used to identify what the original use might be...to buy parts for a tune up.. take a spark plug out.. and buy exact replacement ...you can do the same with the cap and rotor... post pictures of it on an image hosting site like photobucket.. and then the links here..