The 799 is the same casting as the 243 just made at a different GM foundry. You'll see them on the 6.0's - Vette's, GTO's etc... They both flow the same and have the same specs just different numbers. They're no different from Patriot taking a raw 035 raw castings and machining the LS6 style head.
Last edited by NITROUS; 01-05-2008 at 12:01 AM.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
They're probably just the ones out of Mexico.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Could be.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
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