With the MSD dizzy you can the lock the advance out run it locked out till you can get timing controller just take little steps when tuning boost hate see you mess up pistons. I know on a SBM head gaskets are a weak leak ask me how I know.
I was able to find a 10 degree advance bushing. Put that in and I'm going to start out at 20 degrees initial and 30 total timing. The NA motor ran best with 36 total so hopefully pulling 6 degrees out will be enough to start with.
