I had 3.31's put in my dana 44, now speedo Q's

[bk53]

I had the carrier, ring pinion, yoke, side gears spider gears, all bearings and seals replaced by Mike over by me. in my 53 f100. this is behind a dual stromberg'd 276 and a 1957 fordomatic. Initial indications are that it will be ok. I've been on everything but an expressway and the old gal is still kind of torquie, not like with the 3.92s. I got the parts new from Randy's ring and pinion. they had everything but I had to go to a 31 spline yoke.
My question is until I get the speedo gear changed out is there an easy way to convert MPH indicated to actual. The indicator at 55 was where my better half said she was doing 60. I can figure out the math, but if someone else has done it, I'll listen.
The operation was kind of pricey. I think if you can find the 19 spline axle stuff used in good shape, if you have the time to hunt it all down, that'd be the thing to do. I heard some studebakers used the smaller carrier. The 331 might be un ique to Randy's

Thanks,
Bill