Quote:
Originally Posted by clay69camaro
I've looked online for prices of an iron block GM 6.0L and some of the adds specify the 8th digit on the block being a "Z" or "T". What's that all about?
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If I recall, VIN T and Z were both 5.3l engines.
VIN U and N were 6.0l. U is an LQ4, N is the LQ9. The LQ4 has dished pistons/lower compression. LQ9 has flat tops/higher compression.