1969 427 "512" Block Question

**Stefano** · #1 01-12-2012, 09:06 PM

1969 427 "512" Block Question?

Does anyone know a definative time period as to when the casting dates went from the side of the 427s to the rear of the block on top by the belhousing?

**BARRY** · #2 01-12-2012, 09:34 PM

HI MID DEC 1968

**SuperNovaSS** · #3 01-12-2012, 09:40 PM

I think it was mid 69. I have a B 5 9 block here with the casting date on the side.

Jason

**SuperNovaSS** · #4 01-12-2012, 10:06 PM

I just looked in, "Chevrolet by the Numbers" by Alan Colvin. He says the change was made Nov 17th, 1969. The date location was changed at the same time the distributor boss was changed from the high to the short tower design.

Jason

**Carleen** · #5 01-12-2012, 11:40 PM

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SuperNovaSS</div><div class="ubbcode-body">I just looked in, "Chevrolet by the Numbers" by Alan Colvin. He says the change was made Nov 17th, 1969. The date location was changed at the same time the distributor boss was changed from the high to the short tower design.

Jason </div></div>

Its not true.

**69 Post Sedan** · #6 01-13-2012, 12:21 AM

My MN block was cast January 27th and it's cast on the side of the block.

Kurt

the427king · #7 01-13-2012, 12:26 AM

It is a great reference book, but has a few errors in it.

**Stefano** · #8 01-13-2012, 02:08 AM

I wouldn't think the same plant would go back and fourth with where they placed the casting dates?

**Carleen** · #9 01-13-2012, 03:37 AM

My Block is from mold GM4.

**Fast67VelleN2O** · #10 01-13-2012, 06:06 AM

I have a May of 1969 block and its stamped on the back of the block.