Hey guys, i have chris craft 283 i know that initial timing have to be 4 BTDC and total 28-32 BTDC, but i need process instruction:

As i understand i need to set 4 BTDC at 500rpm and it was initial timing or i have to set TDC at 500rpm and advance distributor to 4 BTDC?

And after that i have to look what is total timing at 3500rpms??

I dont understand what it means 15/32 at these operation?

Sorry guys,i understand that it is simple, but its first time to me, so next time i will know it