Holley to GM EFI

[Vinnie Moscaritolo]

Hi;

I was thinking about converting my Holley EFI TBI unit (the old 
analog 2bbl) to work with the GM ECU. As I understand this is what 
Howell does, but they use an idle air control unit instead of the 
solenoid that Holley uses.

I have a few questions that the list might be able to help with.

Can someone tell about Howells idle air control ?
Where can I get one to make my Holley (2bbl) compatible?
Is the GM ECU a good idea?

I am using it on a International Harvester 304 and I have modified a 
manifold to  accept the TBI unit directly, Although I might mount a 
1" spacer under the TBI to give it more clearance.  I hear that this 
is good for low end power, since the IH motor only revs about 4000 
rpm I think this would be fine. but I would like to know if this is 
an OK idea?

thanks again.