It seems the Rockwell and Dana 70HD axles were used almost interchangeably in the p30's.
From what I can find the Rockwell was only available with up to a 4.56. Although I am still researching that, and it may turn out to be up to 3.73, I'll post tomorrow with what I find. I have been checking all my options the last few weeks, and I have investigated a few of the Rockwells, all of them have been geared 4.something or slower.
Perhaps they used the independent front and the I-beam front concurrently on the p30?
The axle swap idea of the hour is an Isuzu NPR cabover truck.
I have located a few that someone is parting out really cheap. He is checking on the ratio for me now, I'll know in a day or two if they are fast enough. The rear should swap just fine. And I think that the front will be narrow enough, I'll know that soon too.
Grigg
