I've finished tearing down an engine I got a few weeks ago.

I've got it down to a bare block and mostly cleaned up.

the number cast into the side of the block is 9- 76. I assume this means it was produced Sept 1976, which would put it in a 1977 model year? Did Chrysler "season" thier castings by putting them outside for a year like Ford did?

the number stamped on the top Right hand front of the block is 6G207435 and on the rear it's 6225R 2 4 27

The crankshaft is # 3769307

No, and if Ford ever did this (which I seriously doubt) they certainly don't any more.
That's the last eight digits of the VIN of the car this engine was originally installed in. The car was a 1976 model built at St. Louis, but that's all we can tell without the first five digits of the VIN.
1976-model 225 passenger car engine missing its day-and-month number, with a sequence number of 2427.

Unless there's an "E" on the rear pad that you didn't tell us about, this should be a forged-crank engine.

_________________
一期一会
Too many people who were born on third base actually believe they've hit a triple.

Thanks for the reply.
I went and looked over the block again and I don't see any letters

I'll order parts for a '76



I had a former Ford engineer as an instructor in college who described the process to us. He worked there in the '60s and '70s

The engine factory would have up to 18 months worth of unfinished castings stored in the yard for a particular engine . THis was done to let the stresses settle out in the castings before they were machined.

The daily changes in temps have the same affect as putting an engine through heat cycles, only more gently.

It allowed them to make larger, more economical production runs at the foundry.
Also, having the raw blocks in stock gave them the flexibility to ramp up production if greater than anticipated demand was encountered.

Of course if they were out of castings, or if a new motor was being introduced, they would use them straight from the foundry .

I'm certain the castings are done "just in time" now also