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    I had an aluminum 426 built that the drivability was not the best, too aggressive on the cam. Do you know what the specs are on your cam??

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    Cap, Tell me alittle about your 426. I have an aluminum block 426, 6M that has a decent amount of cam surge or surging on start out....My 426 is a 4.125 bore x 4.00 stroke, apache heads, the cam is a 113.5 LSA, 231, 236 duration. I made 500 TQ and 508 horse. Arrington tuned it and it was a mess, sent it to Mike at OST dyno and he got rid of 75% of the surge but it is not as easy as a stock 6.1 to drive. I think the LSA on the cam has a lot to do with the surge. Brian
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