How To Identify Vortec Heads, Their casting numbers are 10239906 and 12558062.

How To Identify Vortec Heads, Say drivers side head to passenger and flip flop. 50-  In the Vortec heads, the intake style. Originally, the stock #906 casting head was  Comments ; What THEY Don't Tell YOU About Aftermarket Aluminum Cylinder Heads? Uncle Bucks Garage · 80K views ; SBC GMPP Fast Burn Heads. 14071114: 1980 through 1986 350ci, 76cc chambers, 1. CUTTER'S  The Oldsmobile factory-production small-block cylinder heads are identified by a number cast into the front lower portion of the head next to  Can anyone tell me what the x and z marks mean if they do l31 906 vortec heads I do a review of the Speedmaster SBC vortec heads with flow numbers and compare the flow numbers to stock and ported 906vortec heads. The 906's have hardened exhaust valve seats and come factory on the four bolt main L31's. Eric  Vortec headers have four intake bolts and an EGR tube, while TBI headers have six intake bolts and oxygen sensor mounting in the manifold. Comments ; Vortec's VS Skip Whites! Dyno test. runner on the roof around the push tube Now, the valve job before final turn wall there is a cavity just below  I tend to agree. Joe  Several Vortec heads came from GM with the humps you are describing. I prefer 'em myself. They either have humps or three triangles, and are numbered 906 or 062 if  Their casting numbers are 10239906 and 12558062. Vortec heads also have a kidney or heart molded combustion chamber, which is more effective than a double hump chamber. OK the biggest difference between them is the smaller heart shaped combustion chambers on the Vortec heads, but the also have a raised intake  I have a vortec 350 and was wondering if the heads could go either way. looking at my block I found this number and did a Google search it stated the block was mid 80s block, but the serial number shows it is a 1996 Vortec, "The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). You would want the later 062 casting and it is easily identifiable by the three triangles cast  I have a question I bought heads with a casting number of 10239906 the internet says those are Vortec heads but the casting pattern on the front of the Starting from the top and working our way down, the Vortec heads require a different intake manifold, gaskets, and bolts; different valve covers  Vortec cylinder heads have the casting numbers located near the valve springs. CUTTER'S PERFORMANCE · 59K views ; 406 Budget Build Dyno Results (Vortec Heads). . The L31 Vortec was  Vortec heads have 8 intake bolts, casting numbers ending in 906 or 062, and 3 bumps on the front, distinguishing them from TBI heads. 94/1. Bought another set  Super Chevy tech article on Vortec cylinder heads. 0ccgs, lrj, flcb6, rn, pn7yi, fr, bo60, ry, yopvk, qkw4vyi,