Thread: ZL1 parts
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Old 09-06-2010, 10:53 PM
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Default Re: ZL1 parts

Mutt

The numbers de-code as follows

The 3946052, block casting number designates the block as a ZL-1 aluminum 427

The T0507ME Engine Date Code
T= Tonawanda Plant
05= May
07=7th day
ME= 427/430hp, M22 Trans, ZL-1 Perf Package

The 3 4 69 casting date code
3=March
4=4th Day
69=1969
195=???

All these numbers help determine what the engine really is, the car the engine was originally planed to be use in and the dates it was made. That’s very important to a lot of people. People want to make sure they are getting what the seller says they are getting and the dates, cast numbers etc help verify that.

Other than the pistons are the internals all stock?
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