506 BLOCK WORTH ANYTHING?

[spdgofast]

So you had a 599 block in your 1993 from the factory not a 506 block correct?

 

[3500GMC]

So you had a 599 block in your 1993 from the factory not a 506 block correct?

Yep Yep. In that crossover year the 599 block (one piece rear main seal) could have been bored for 6.2 or 6.5. Same stroke.

 

[Twisted Steel Performance]

July 18 1996

That's a older gm block, GEP took over in 2001 and the blocks will have double diamonds in the valley.

 

[spdgofast]

That's what I thought Chris but there is no Navistar diamond in the valley.

 

[spdgofast]

Can anyone decode the "G186" casting on the PS side of the bell housing?

 

[spdgofast]

This block is a Peninsular Marine block, so where did they get their blocks when this block was made? So is it an early 506 gm block without piston squirters?

 

[spdgofast]

July 18 1996

That's a older gm block, GEP took over in 2001 and the blocks will have double diamonds in the valley.

Sorry Chris, I didn't fully comprehend your statement before I replied. Oldtimers disease.

 

[Twisted Steel Performance]

You have a run of the mill old GM block without piston oilers ....

 

[Twisted Steel Performance]

Can anyone decode the "G186" casting on the PS side of the bell housing?

July 18 1996