425 Poncho HO EFI?

[Clare Snyder]

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