Decode Block Numbers

Help with decoding your Hemi engine.

Moderators: scottm, TrWaters, 392heminut

Post Reply
SSSN8KE
Posts: 2
Joined: Mon Sep 23, 2019 6:51 am

Decode Block Numbers

Post by SSSN8KE »

Hello
I'm trying to find out about my Hemi. The numbers stamped on the block are:

2468330-M

Then to the right of these numbers are:

17A 1
2

Can someone decide these?

Thanks
Stu.
George
Posts: 702
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: Decode Block Numbers

Post by George »

What type of Hemi?
Dan.U
Posts: 1
Joined: Tue Jul 21, 2020 12:35 pm

Re: Decode Block Numbers

Post by Dan.U »

I have a 50's Hemi with the numbers " m354 - | 4 |3 "
this number is behind the water pump and center on the block between the heads.
I was told that it was a 1954 354 from a school bus. I know it came from a bus, but the 354 didn't come out until 1956.
the 4 bbl carb has been added,here is a picture of the original intake or the one that came with the engine, it has the water inlet (thermostat).
the Valve covers are 20 1/4 " - over all length.
I have search some web sites and this numbers does not come up.
any Hemi guys out there know what year or cubic inch. any info. will be appreciated.
You do not have the required permissions to view the files attached to this post.
BlueDjinn
Posts: 57
Joined: Fri Aug 28, 2009 2:27 pm

Re: Decode Block Numbers

Post by BlueDjinn »

2468330 is a Hemi block. Casting #2468330-M is a 4 bolt main hemi type MEGA block with wedge mounts and head bolt location. It can be a replacement block for 440. Check your bore size.
George
Posts: 702
Joined: Wed Aug 25, 2004 4:12 pm
Location: Fl

Re: Decode Block Numbers

Post by George »

M354 Could be a 1959 354 from a truck.
Post Reply