Here are some links, but I am sure you already know about them. If not I do hope they are helpful. What I do not understand, is Jim Steck mentions you specifically on his webpage, so you MUST know about him and his work with the TS engine, Supercharging and such. Otherwise I don't know what else to say.
This link has you mentioned towards the bottom.
http://www.autocomponenti.com/new.htm The link is to your email address:
acs@alfacybersite.com
Which is verified as you here:
http://www.alfabb.com/bb/forums/show...6&postcount=59
This link has a pretty comprehensive list of details of installing a TS engine.
http://www.alfacentro.com/features/twinspark/index.html
This one has some surface info
http://sfaroc.tripod.com/archives/id35.html
Here is a list of necessary items needed for a conversion. Some of this will be different for an Alfetta I imagine.
http://www.autocomponenti.com/twinsp...pping_list.htm
EBSpares and Alfaholics have many if not all the parts needed for a swap.
http://www.ebspares.co.uk/new21.htm
http://www.alfaholics.com/racing_and..._engine_parts/
There is more out there and in here, in any case good luck!