I am sure this is a needle in a haystack but I am looking for that original motor. the last 6 digits of the car are 465803. If I can not find the original block, I would like to find a replacement. I purchased a motor for the car and just found out the block and crank are cracked. I have everything from carb and intake to pan and almost all accessories. I just need a block and crank. can anyone point me in the right direction?