[btct512]

I have a 70 elky that came with the L-34 350hp 396 which had been removed by a previous owner, I am trying to track down as close to original as possible build date on cowl tag is 09 d 00064
Built 4th week of september.

What engine codes should I look for as well as dates to get date matching?

is this a 2 bolt or 4 bolt main?