SBC CHEVY 406, 421 434 CUBIC INCH DART SHP BLOCK. FINISHED OUT AT 4.155
2pc. Rear Main Seal. This block has 350 mains. Be sure of what size mains you require before purchasing this. We do not offer this block with 400 mains at this time.
This block kit is fully machined. Bored, honed and decked. Stroker clearanced for up to 4.00 stroke. We also offer this block finished out at 4.030, 4.125 and 4.165. Upon special request, we can finish out up to 4.185.
his is the style block we use on all of our 377, 406, 421, 427, and 434 engines. We have built engines in the 900 hp range using these blocks with no problems.
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