[quote=&quot;John Schwiebert&quot;]Well I have been asked that before on a 1655 gas. It is not an experimental engine. Does that block have a date  code. It could be a code on which shift the block was poured.[/quote]

[quote] The block does have a date code. But the 2 X's are approximately 1 inch tall each. I will try to post a picture.[/quote]