Stop in for a cup of coffee

71GSSDemon said

I am still not sure what you are referring to as KPI. King Pin ....something I assume. As for being up to the task, I am making assumptions that they are fine as the car is so light (less than half of factory weight 37) and the little use. I have been on the HAMB a bunch and used to be on Killbillet as well. Yes they are focused on beam axles and that is what mine is. I read about making a tool for setting the toe on these, I will see about making one up. I have wondered about the races being parallel. I have an extra set of hubs with new seals and inner bearings. Just need to get new outer bearings and will use the new ones when I put it back together.

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KPI= Equals King Pin Inclination. Basically the difference between the angle of an imanginery line drawn thru the center of the King Pin and the true vertical axis at the center of the king pin.

beam axles , not supported correctly can bend slightly to cause an increase or decrease in that inclination. A LOT of rat rods, street rods and even factory model Ts and As can develop this problem. Especially if one hits a big enough bump and have a weight drifting over the front beam. IE, a big block that weighs twice or more what the axle was designed to support.

the 37-48 ford front I beam axle had a problem with this as the king pin angles were set at what many say is the max for a beam axle. Not a lot of room for flexing. Add in the fact the 37-48, some were cast iron vs forged (most ended up being cast due to costs) you have an axle that potentially is prone to KPI movement.