Setting the timing in a 468 BBC jet boat?

Question

It is a 468 BBC with about 9.5 to 1 comperssion. i need to know where to set the timing in it. it is a stock HEI with the vac adv welded up on it. Some one had told me to start about 35 to 40 on BBC. need help

Answer 1

Set the timing by turning the distributor lantern.

Start with 10 deg advance with the vacuum hose off.

And a total adv of 35-40 At 3000 rpm to start with, then tune it further.