No casting number

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Nov 26, 2019 | 07:49 PM

wtroger

Thread Starter

Cargo Master

Joined: May 2001

Posts: 3,208

Likes: 13

No casting number

I have what appears to be a 302 trying to get a handle on what year it’s out of an 81 f150 but we no it is not original. Trying to insure we use the right flywheel. There is no casting number on the side of the block. All I can find is what I would call a rebuilders tag and it reads
fdsfm302dcp
4180310020
any help would be appreciated.

Nov 28, 2019 | 06:36 PM

Conanski

FTE Legend

Joined: Jun 2006

Posts: 31,930

Likes: 1,499

From: Ottawa, Ontario

Well '81 was right around the time engine balance changed so I get the question, if the rebuild used an early block it would be 28oz but if it's a later block it's 50oz. You say there are no casting numbers at all, they are usually down near the starter on the side or on later blocks on a flat that faces down and they can often get caked in gunk and be hard to see. I have seen blocks with some missing numbers but never one with none at all.

Nov 29, 2019 | 07:08 PM

baddad457

Hotshot

Joined: May 2003

Posts: 11,141

Likes: 25

From: south louisiana

Quote:

Originally Posted by wtroger

The imbalance depends on the crank, not the block. The changeover occurred around 81-82, the blocks used in that period were the E0AE blocks which were used with both 28 and 50 oz cranks. Then there was the switch to the 1 pc rear seal, that occurred after the 50 oz cranks came out. Get the casting numbers off the crank.