454/455 Intake

I'm building up this 1968 455 that I recently bought for my 1969 Cutlass. I really want to make high horse with supreme air fuel delivery. I went to Summit Racing online and I found MPFI (mulit port fuel injection) for it but it doesn't come with a manifold or in a set. But I was looking at the intakes that went on the BB chevy and they come in complete sets with the manifold.
My question is are the bolting patterns for the 454/455 intake manifolds the same?
If you have any information it would greatly be appriciated because this would be a big investment for me. :banghead:

The only thing the 454 and 455 had in common is that they are both made by GM. Nothing interchanges between the two.

If you must have FI on the 455, use a throttle body set up like the Holley Pro-Jection, where the throttle body bolts to a standard 4bbl carb flange.

If you want to build big power with a 455, toss the cyl heads and go for some aluminum aftermarket heads, (Edelbrock or Mondello)

Actually, Mondello heads ARE Edelbrock...
Edelbrock also makes the desired intake for this application. Torker 455 (part no. 2730) is about the only decent intake readily available for Olds engines.
The EFI system likes an "open plenum" intake. Avoid "dual plane" intakes. The manifold will be required to have the nozzle holes machined in. This is not a job for a hand drill and a picnic bench. They should be done on a vertical mill (Bridgeport).
You're going to find a sad shortage of high-end parts for the Olds engine. There are some specialty shops that cater to them, Mondello, included.
Comp supplies Xtreme Energy hydraulic roller cams, and the necessary hardware to upgrade the block to accept them. Their (Comp) rocker/stud/pushrod "kit" is excellent, to eliminate those dumb rocker bridges.
If you pick carefully, and get your information from non-Chevrolet sources, you can have a very good performing and efficient street car. Just like the Pontiac, if you rely on Chevrolet info sources, it won't run well, it will live short, and you simply won't be happy with it. Chevy guys are great when it comes to Chevys. They tend to forget there are other viable alternatives out there, even in GM.

To take what MagicRat said a step further, not only is the Olds 455 completely different than the 454 Chevy (maybe SOME of the bolts might fit...), it (the Olds) is also completely different than the Pontiac and Buick 455s, which are different from each other. So be very careful when picking up "used" parts. They MUST be for the Olds, specifically, or they won't fit.