Tall Deck Cast-Iron Bowtie Race Block

If you’re looking to build a drag racing engine capable of producing 1,200 horses or more, a Chevrolet Performance cast iron Bowtie Race Block is your starting point. It is designed for engine builders who want to custom-machine their blocks for specific racing applications. Toward that end, these premium castings have thick deck surfaces, improved oiling, improved coolant flow and splayed 4-bolt steel bearing caps. Everything is secured with premium fasteners. The combination of a Chevrolet Performance cast iron Bowtie Race Block and your unique engine building skills will put you down the track ahead of the competition.
19212197 Chevrolet Bowtie Race Block
CNC-machined cast iron 4-bolt block
4.240″ finished bore
4.600″ max bore (.250″ min wall thickness)
Tall deck height (10.200″)
Lifter bosses are .300″ taller than standard blocks
Tested to 1,200 horsepower!
Cast-Iron Bowtie Race Block Technical Notes:
Precision CNC-machining means +/- 0.001″ tolerances
Blocks are available in short deck (9.800″) or tall deck (10.200″)
A sonic bore check data sheet is provided with each block
Siamese cylinder bores
Improved cooling around number-1 cylinder
Accepts Mark IV or Gen V, VI cylinder heads
Use Gen V head gaskets with Mark IV and Gen V cylinder heads
Use Gen VI head gaskets with Gen VI cylinder heads
Requires Mark IV design 2-piece rear main seal oil pans
Requires Mark IV design crankshafts
Can use Mark IV and Gen V, VI camshafts, timing sets, lifters and timing cover (aftermarket belt drive timing covers may require clearancing)
Blind-tapped head bolt holes; extra inner head bolt bosses provided
4-bolt SAE 8620 main caps splayed 16° on the three center mains
Priority main oiling wet-sump system
Provisions for dry-sump oil line provided
Honed camshaft and crankshaft bores
0.842″ lifter bores (maximum 1.06″) may be relocated
Distributor gear clearance at bottom of number-8 cylinder bore should be checked
Machined mechanical fuel pump pad