Need help with 1978 F600
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Joined: Mar 2004
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From: George county MS
Need help with 1978 F600
Clark 5 SPD into a forward/ reverse/ direct transfer case into Rockwell 8.62 will obtaine 58 MPH HWY speed 360CID turning @ 90% . Wanr to know best solution to obtain 70 MPH at 75% engine RPM. I am thinking 2 speed axle change. Any suggestions will be greatly appreciated. Thank You. WilliamCRawley
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Joined: Nov 2000
Posts: 6,628
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From: Albuquerque
I not sure if they make an adapter for your ap. but Gear Vendor's overdrive might fit the bill. 22% overdrive and they put them in dump trucks and motor homes. A little pricey. Probably arount $2,500
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