The Vortec heads use center-bolt valve covers, and the bolt pattern and angle of the intake manifold surface are different. Other than that, everything else should work fine. The Vortec heads ...

Vortec heads look similar to any '87-and-later center-bolt head-the ends have the same accessory mounting holes, the exhaust flanges are the same, head bolt patterns are the same, and so on.

But alas, Vortec heads will not simply bolt onto the TPI...until now. Nicky Fowler and his staff at Scoggin-Dickey in Lubbock, Texas, put on their thinking caps and machined a new and unique ...

Only center-bolt valve covers bolt on. Enter Edelbrock. Its new E-Tec heads retain the best features of the Vortec configuration but are set up for high-performance use. They bolt in place of ...

all of which were secured with a new 18-bolt head pattern. The engineers also decided to alter the firing order. Older GM big ...

Aluminum heads, stroker kits, camshafts, and intakes are among the bolt-on parts that will step up the Vortec 8100's game. With bolt-together kits available that send power as high as 685 ...