Whether it's a 632 in a Chevy ... fix header leaks, using the right gasket and installing it properly is critical. Ideally, a header-flange gasket should have openings larger than the exhaust ...

Alas, the LT1-you were here ... can be used with light gasket-matching and boredfor 52mm throttle body52mm throttle bodyAdjustable fuel pressure regulatorAftermarket headers and exhaustCustom ...

These '92-and-up LT1 Corvette headers ... These big-block Chevy street rod headers will fit most early chassis. They come complete with flange gaskets, collector gaskets, and hardware.

The intake manifold bolts are torqued to a mere 11 ft-lb, any tighter than that and the gasket are damaged. Chevrolet ... All GM Performance Vortec heads have 2.00-inch intake and 1.55 exhaust ...