Big block/3 on the tree?

The A903 in Vixen works great. I can even coax it into first before a stop. As my grandmother would say, you have to hold your mouth right. And yes, all things equal, straight cut gears are stronger.
I used to have (several) old Chevy 3 speeds, and got to where I could double clutch them into 1st from 15-20mph on a lucky day

Our service trucks at NAS Miramar were 6--3 on the column. One day the Chief and I were going somewhere and I rolled up somewhere and casually clutched it right into 1st. HOW DID YOU DO THAT? He wanted to know!!