I need timing advice
 

I have a 3.2 that was bulit on a sc 3.0 case in the early 80's.. It is 10.3 c/r, ge60 cams, large port sc heads that have been ported , flowed and twin plugged, with weber 46's. The dist is based on a sc dizzy with RSR cap and rotor. I do not know how the dizzy was curved. I should be able to run less advance with the twin plugs. Anyone know a good setting for total advance with this engine. thanks tom