Sorry to take so long guys, I've been out of touch for a couple of days. I've checked all the numbers on the engine that I can locate and here is what I've found:
The block casting number (just in front of the fuel pump mounting boss and VERY hard to see) is 3707467.
The block casting date (almost behind the starter)is CON1 E 13 3.
The head casting number is 8707887 with GM 4 below that. Inside the valve cover is CON 13.
The head casting date inside the valve cover is E 1 3.
The number between spark plugs 2 & 3 is 14B with 887 below that.
The valve cover has only 2 bolts holding it down and the temperature sender does not use an adapter. The sender goes to the stock 1951 guage.
The serial number again is LAQ282982.
Hope I got all the numbers from the right places. I'd be very interested in what you all find out with these numbers, but my luck will probably keep it from being anything interesting.