A500 in an Early A

What engine are you using? The 273, or 340/360?
If using the 273, you do realize there is a problem with the converter register in the crank. The small blocks are just like the slant six. 67 down has the small (1.550) pilot register. 68 up has the large (1.810) register. The A-500 converter will not fit the early crank.