I bought a rebuilt engine 302, was wondering what year it is the number above the starter area are EOAE also D3C and 2D13. Also there is the number 80 that is cast on to a stem( it's part of casting about 2 inches sticking out. looking thing coming off the side of the block.then the numbers I could see on the crankshaft are 28, SM, 2MA,27.. I think this is a earlly 80's but not sure , trying to figure out which harmonic balancer an flexplate to use. thanks for any help.