Your OD may be the key, the torque curve prolly doen't match too well. The six lugs down 'cause your truck is heavy & the 250 doesn't have the torque at that RPM. That's a big cam in a small six.

Last edited by 64fleetside; 10/30/2007 12:24 AM.
My \'64\'s in the Gallery
Pictures in my Photobucket
1964 C10 Custom Cab 350/700R4
1964 Suburban 350/700R4
1979 Ford F350 4x4 400/c6