need help with engine code

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**SuperNovaSS** · #1 05-10-2012, 12:22 AM

I though XAA was a high performance suffix. Possibly LS6 crate engine.

Jason

**Big Block Bill** · #2 05-10-2012, 01:36 AM

Jason,

You are correct. I have both an LS-6 & an LS-7 that were purchased from GM in the late 1980's. The LS-6 has GM Part #366250 and had a engine suffix of "XAA" and the LS-7 has GM Part# 3965774 and had a engine suffix of "XCH".

I found out the hard way you could run the LS-6 like you stole it right out of the crate, but the LS-7 had poor tolerances, and spun a main @ 100 miles. When we took it apart, 1 cylinder was over by .010 then any other, so it had to be bored .030 and it has never been fired since(that's the engine I now have for sale in the classified section under "Big Block Garage Sale&quot

His TD13XAA is probably TO13XAA for January 3rd 198? XAA an LS-6 Complete Crate Engine

Bill

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