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Re: 632 engine
Idle for most was 450-500 rpm, many parts were shared between all v6's the v12 and v8. The 637 actually replaced the v12 in 1966.
With the amount of torque and the power band....the v8 would be really no different than having the v6 in a truck. It produced over 560 foot pounds at 1600 rpm.....a 3/4 ton with a 3.42 ratio and a 5 speed would benefit well from that much torque. Only thing would be Size as that v8 would make a big block look small.
The sweet spot to run them was at 2000 rpm as many were governed. I believe the 478 was governed to 3200 in big rigs.
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