71 Lt-1 engine suffix code

[Robert G.]

Hello,
Can you please let me know what the engine suffix code is as it would appear on underside of block , see JG example in photo.
Thank you
Bob

[Ron G.]

Re: 71 Lt-1 engine suffix code

Bob, The 1971 LT-1 Engine code is: CGZ. It was written upside down on the side of the block in a yellow grease pencil. This told the line workers working at Flint exactly what internals will go into the engine block. - Ron

[Ron G.]

Re: 71 Lt-1 engine suffix code

Bob, The 1971 LT-1 Engine code is: CGZ. It was written upside down on the side of the block in a yellow grease pencil. This told the line workers working at Flint exactly what internals will go into the engine block. - Ron

[Gary B.]

Re: 71 Lt-1 engine suffix code

The photo in the TIM&JG is oof a 1970 LT-1. It says CTK
Gary Bosselman

[Patrick H.]

Re: 71 Lt-1 engine suffix code

Hello,
Can you please let me know what the engine suffix code is as it would appear on underside of block , see JG example in photo.
Thank you
Bob

The engine suffix code written on any block (i.e. any horsepower or configuration) should be the same one that's on the stamp pad as well as on the sticker on the valve cover.

[Kenneth B.]

Re: 71 Lt-1 engine suffix code

Think they put the engine code there so they could get the right engine in the frame without having to look at the stamp pad.

[Patrick H.]

Re: 71 Lt-1 engine suffix code

Think they put the engine code there so they could get the right engine in the frame without having to look at the stamp pad.

I think it was done to identify the block when going down the line at Flint or Tonawanda before the stamp or the suffix sticker ever went on the block, since it's under the paint.
Only with age can we generally see it under the paint. St Louis and now Bowling Green look at the suffix sticker.

[Mike E.]

Re: 71 Lt-1 engine suffix code

Here's anblock CGZ crayon (2).jpg original. Rather faint--the "G" is in the center, the "C" is hard to see other than the bottom.

[Robert G.]

Re: 71 Lt-1 engine suffix code

Thank you Mike!

[Robert G.]

Re: 71 Lt-1 engine suffix code

Thank you Mike!

[James G.]

Re: 71 Lt-1 engine suffix code

great photo mike!