I was told on the datsun 1200 forum that the 310 alt bolts right in and is IR but i didnt see any info about that when i did my research.
Thats cool that yours bolted up. I think now i may have re-invented the wheel but i was feeling proud of my self right after i did it lol.
I thought the A15 had some minor differences from the A14 but im not sure, never even seen an A15 my self.