AllPontiac/BOP are planning on having 3'' and 3 1/4 main cranks. Strokes will be 4.00, 4.250 and 4.500. on the 3'' main. We do not know the stroke on the 3 1/4 crank at this time. But there will be one for that size for sure.
Yes, there are a lot of motors running the flexObend brand cranks. Some will last and some will not. You can't make power and trust this type of crank anymore.
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 Bob C.
Quickest, Fastest, Best selling Pontiac Aftermarket Block IA II and Tiger Heads
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Allpontiac Big Chief Aluminum Engine Block
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