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Re: 4bt cummins swap
4bt vibrations are over exagerated, I have 3 trucks with them and they vibrate no worse than a lot of the 6.2L trucks I have driven.
I also have 4.10 gears and the sm420 and I don't have to rev to 4000 rpm between shifts so there must be a large differance in toque down low between it and a 261.
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63 k20 with cummins 4bt, owned sence 1982
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