I am not worried about a 68 block going into a 69. There has to be some sort of lag. Any feel for what the "average" lag time was back then? Probably depends on assembly build more than anything else.

See I am still learning things everyday. I forgot about the VIN possibly being on the lip of the block where the tranny mounts. Hmmmmm.... I'll check that as soon as I get home tonight. The block has been sitting there all these years and I never thought once to check there!!

I'll check the flat pad near the distributor opening while I'm at it and write those numbers and/or letters down and report back later tonight. I know I won't know what they mean. Forgot about that also!!