schartzracing

Where can I get the ID. eng number to ID. the LS 1 engine? Where would the numbers be located on the block. This engine has a cast iron block with LS 1 alum. heads.
Mike

Darracq

iTrader: (1)

Hey mike, this is Darracq i was just looking for that info i found it before but cant remember where, There are some number on the block hehind the driver side head, if you want to post the number, and the number off the head. will be able to figure it out.

Darracq

iTrader: (1)

Here is something else i found

www.automotiverebuilder.com/ar/eb040538.htm


has some casting numbers.

schartzracing

Near as I can tell without taking it apart is that it could be a 4.8 or a 5.3. The only part of the casting# I can make out is the 12551 & the heads are 862 & I was told it was a 99 model.
Mike

Darracq

iTrader: (1)

Ya looks like the 4.8 and 5.3 use the same block and heads, The 5.3 would still run pretty good, lots of guys use them as they are cheaper,