A good online source of parts for the AC Delco Coils,
Connectors for your EC2 wiring harness:
http://www.rockauto.com

Prices are less than half the cost of GM parts from a
dealer. I have placed 3 orders with rockauto and all
have shipped and arrived within the week ( with UPS
tracking numbers ).

If using the AC Delco D580 Coil, there is a third
option for wiring this not covered in the current EC2
manual. An AC Delco PT 368 ( GM 12102741 ) connector
is  available that can be wired directly to the EC2.
This connector runs less than $20.

In pricing up the other option I believe this saves
the  builder more than $250. 

I did find an online store that also had good prices
on coils and the official GM connectors. However they
were very slow to ship, unresponsive to emails and do
not have a complete return policy. The parts did
eventually arrive though and I would consider them if
trying to get the lowest price on GM parts ( and have
plenty of time to spare ). 

http://www.gmpartsdirect.com

Mark

BTW I now have 4 x PT381 Connectors for Sale ( cheap !
)


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