Thread: Allison 6 Speed GMC 401
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Old April 24th, 2015, 12:41 PM
tommr tommr is offline
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Location: phila pa
Truck: 1947 Flxible Clipper Bus 29 passenger 401 M
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Default Re: Allison 6 Speed GMC 401
Yes ours had a 320 Buick inline 8 originally. It was converted to the V6 in 1971. Gonna be interesting to see how well it pulls 5th. The 478 would be unbelievable in a Flx. Tom
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