Int'l. 4900 Wheel Base ??

[guest]

Anyone have an idea what my wheelbase should be on an International 4900 - BBC 101" - 72" sleeper - and 24' box (actually 24' 6").
Also, any info on axle ratio? DT530-275hp-950 foot pounds-Spicer 10 sp. OD. 3:70? 336?