[muscle_collector]

while looking at some other stuff today. I just decided to look at the casting number of the D259 WS that I posted pics of above. I was surprised to see this 9790071 casting number instead of a 14 cast block.

[muscle_collector]

Originally Posted by Joe's Garage

Four different 1969 'WS" engines/blocks have passed thru here in the past ten years and EVERY ONE had all four HOLES but only two-bolt CAPS.

Same as Gary's pic above.

Five 1970 'WS' blocks during the same period, including one that's here now. ALL had four holes AND four-bolt caps.

Of course, we all know that there are ZERO absolutes when it comes to how Pontiac did things......

my personal experience as I stated above is that all of the 69 gto ra3 engines that I have seen all were drilled and tapped for 4 bolt mains but only had the two bolt caps.

[Uncle Judge]

Originally Posted by muscle_collector

my personal experience as I stated above is that all of the 69 gto ra3 engines that I have seen all were drilled and tapped for 4 bolt mains but only had the two bolt caps.

The earliest 914 block that I have ever seen was a F or June. And they were all drilled and tapped for four bolt main’s

[muscle_collector]

I looked at the D159 engine and it is also a 071 block