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I had a b600, same motor, 27 footer, 330 short stroke (same block as 361, 390) and had the small 2 barrel on it.
got 8-9 mpg with rather firm driving, i didn't baby it at all and it had plenty of power for what it was. no complaints whatsoever.
length matters. shorter is better. long busses have more problems. brand doesn't matter (necessarily). tall inside, short in length, and one size bigger motor than standard is the ideal. |