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Block ports have 3/8"-24 threads that accept 3/16" inverted flare style fittings
1988-1990 Chevrolet K3500All GM TH400 automatic transmissions
highest quality crankshafts available on the market today
but don't let size fool you
Cometic Head Gasket - 4.060" Bore - 0.036" Thickness - Multi-Layer Steel - SB Ford 24232413 Block ports have 3/8"-24 threadsComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 036". Cometic MLS (Multi Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two
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