425 Poncho HO EFI?

[Carl Summers]

Clare Snyder wrote:
> 
> A good friend of mine has 1 '69 Pontiac Gran Prix with the 425 RamAir 3
> HO engine. Currently has a Rochester quad on it, but not the right one.
> He would like to put EFI on it and, as if I didn't have enough on my
> plate, I offered to try to get some info for him. What TBI unit should
> fit this beasty? I imagine there is something that will bolt to the
> stock 4bbl manifold - an EFI manifold to fit would be asking a lot. Then
> the question is, what engine/model would use a computer that would be
> "close" to the right capacity, or has someone out there done this and
> would be willing to pass on some first hand knowledge. Prefer to stay
> with GM OEM stuff rather than some esoteric third party, high priced,
> solution.
> 
> reply to PONCHO at snyder.on.ca
> 
> Thanks

Hi Clare,
  Painless Wiring makes a universal harness part # 60101(around
$300)..Then use a 454 TB or a Holley 502-6(670cfm)(around$290.00),many
options on fuel pump,,I like the Mallory 4060FI(around $150.00)...Get
the sensors(MAP,Knock,O2,Temp,ESC,etc) from a parts house,,,use a
GM1227747 computer, Start out with an ASDZ bin, eliminate the VSS and TC
lockup and remap,,,walah you are computerized...The only tough thing
you'll have is to take a pontiac HEI and convert the module for the
87-91 chev truck...But not too hard....If you don't want to worry about
the esc for knock retard,,,you can eliminate this by starting with an 87
454 Bin file,,AZFT...this one is T-400 so no VSS or TC lockup or knock
to worry about either....I'm sure you have many more questions so rather
than babble on,,I'll answer them specifically.....HTH's
-Carl Summers