Ultra-Seal Valve Cover Gaskets .312 Inch Thick Fits 1965-2000 Chevrolet 396-572 Mark IV/V/VI Big Block Mr Gasket Performance - Exhaust Pipes - Exhaust Tubing Superior Sealing Power: The Yms18926

Superior Sealing Power: The Yms18926 Differential Pinion Seal is designed to provide an airtight and leak-free seal

And what is sitting right under that area

25 Inch of front suspension lift

RWD / Note: Dana 80 Rear

Ultra-Seal Valve Cover Gaskets .312 Inch Thick Fits 1965-2000 Chevrolet 396-572 Mark IV/V/VI Big Block Mr Gasket Performance - Exhaust Pipes - Exhaust Tubing Superior Sealing Power: The Yms18926These are high quality Gaskets that works well on those hard to seal applications. The low density fiber & rubber blend Gasket material seals those minor head imperfections with a low clamp force. At . 312 inch, the extra thickness can also offer slightly more clearance for roller rockers. Ideal for all those high performance applications where you take the valve covers off and on a lot, and sticking is a problem. Fits all 1965 2000 Chevy Big Blocks: