I don't really know for sure but I might speculate the Darlington Pair -Emitter mod on the Guild/ Hagstrom pickups ,perhaps also added magnet material ?Filters in the Bass as well .  I think that if you have an  ALEMBIC SF-2 and either the old stock Guild / Hagstroms or  Dark Star pickups you might get a sound you might like. My old Guild/ Hagstrom pickups  were modified with added magnet material . I sold those pickups in 1975.  

Actually I'm using a Guild/Dark Stars with a SF2. I get a really good sound although I would like to get a little more power out of the D & G strings. I thought I might try a stratoblaster to see if that would give me that little extra punch I'm looking for.

Yes , perhaps. Also raising the pole piece screw adjustment on the pickups , you were able do do that on the OLD Guild pickups , can  you do that on yours?  Also perhaps if you wire the Bass Stereo you could dial in the bridge pickup with added FILTER GAIN with the SF-2 !   Just some thoughts _____

The current issue of Premier Guitar has interviews with both Jack and Jorma, if anyone is interested.  The entire current issue is available for free electronically on their website.