Info needed: Streetable CMP truck

[Bob Carriere]

A top speed of 55 mph with standard C15a axle gear ratio.......

My 261 stock rebuilt gives me 44 mph with the 10:50 Chevron tyres and that is pushing near 2990 RPM........

Now my speedometer has not been calibrated using a GPS reading and I think my rpm meter is reasonably close to a testing separate rpm meter gauge.

Planning to calibrate the NOS GMC speedo with a telephone app this Spring.''I do have a mounted set of NOS 9:00 x16 Michelin that have not tried yet.. I believe from all account thats the radial are far smoother b ut not sure they would increase the top speed unless the rolling diameter is greater than the 10:50.......

How do I get more top speed without pushing the 261 much over 3000 rpm????

44 mph is a handful not sure I would feel comfortable at 55.......

Note that non of my tires have ever been balanced yet....... one truck tire shop would not tackle the 10:50 on my CMP rims ..... have yet to check with Benson truck shop....

Properly adjusted new brake linings on radius linings matched to turned drums seems quite adequate.

Comments/suggestions welcome before I paint RED racing stripes on my CMP.......