Block Casting Number Cannot Find It Listed Online !!!!

[only126db]

This truck I picked up has an unknown block, said to be a 350, heads are tbi heads for 302/350, casting number starts with 387, I cannot find any casting number anywhere online that seems to correlate with mine !!!

HELP

[geezer#99]

It's actually a 3970010.
Common 350.

[mongocanfly]

Agree with geezer..my 350 4 bolt is 3970010..and for reference my buddy has a 350 2 bolt with number 3970014

[barry1982]

Hi there.... just an FYI..... sometimes 3970010's are two bolt mains. I have one in a 72' Chevelle.

[geezer#99]

Originally Posted by barry1982

Hi there.... just an FYI..... sometimes 3970010's are two bolt mains. I have one in a 72' Chevelle.

At least it's not the super rare Canadian only '5 bolt block'!!

[only126db]

After searching and searching I do believe it is a 9 not an 8.

[barry1982]

Hey Geezer.... Canadian '5 bolt block...?????

[geezer#99]

Originally Posted by barry1982

Hey Geezer.... Canadian '5 bolt block...?????

Just for entertainment. I''l highjack this thread!!
Picture this!
Me and a buddy sitting in the shade at a carshow In Rocky Mountain House. His one of none 57 El Camino ( modified 2dr wagon) sitting nearby. A couple good ole boys looking under the hood of my buddies camino discussing the fact that one of them had a new 57 just like it in 1957. But his was red and had the 'canadian only' special 5 bolt main block!!
WE had to ask! He said it had the normal 4 bolts but had an extra one straight up the middle on two caps.
We're still shaking our heads and laughing!!
Rare indeed!!

And now back to your regular programming!!

[barry1982]

LOL...... I imagine...... wouldn't want to tighten that 5 th bolt too much..... ! LOL