receiver/trigger guard combinations ???

[uhjohnson]

How many receiver, trigger guard assemblies were made in the model 8 series that would crossfit one another. I have a 21,000 and 26,000 model 8 receiver and trigger guard assembly. The 21,000 straight trigger guard will fit the 26,000 receiver because it has a double tapped/angled block on the upper tang. The 26,000 trigger guard will not fit the 21,000 receiver because it has a curve and the mounting hole is not in the same position as well as the receiver has only one hole tapped in the upper tang block.