[Wbulk]

Yes, I would go with the 10L to give you 20 deg. of mechanical advance. To check this if you have timing marks on your damper you can set initial at 0 deg and rev the engine up to about 4K and watch the timing marks with your timing light. If you have vacuum advance it needs to be disconnected. If everything is working right you should hit that 20 deg. mark. Then you can add additional initial timing to get it where you want, somewhere in the mid 30s.

Or if you just want to set it for total advance, with vacuum advance disconnected, rev it up to about the same 4k, set the timing to about 36 deg. This of course is if you do not have really heavy advance springs. This would be a good starting point as engines vary depending how they were built, altitude, CR, AF ratio, etc.