69E going to 2.2 with 2.7 heads and S cam. Use early MFI system or later?
 

Have a 2.0E with matching number so I'm going to use the original case.
Just doing 84 or 85mm slugs/cyl (2.2 or 2.25), later 2.4 or 2.7 heads, and likely an S cam or similar.

Figured bumping up to a 2.2S would be perfect since it will mostly be a weekend back roads toy.

I'll also have access to a later MFI system that came off a 72 2.2T. Complete. (pump, stacks, injectors, wiring, etc..)

I know the 69E MFI is slightly different with the early single piece magnesium stacks vs later 2 piece plastic stacks, later has a cold start solenoid, etc..

Regardless of the MFI system used, the pump will still need to rebuild with a 2.2S space cam.

So for a 69E, is there any benefits for running the later MFI system? The engine is going to be rebuild so everything is coming off anyway.

Thanks

You don't mention which throttle bodies you're going to be using. I suspect that both of the options that you listed are sized to match 32mm intake ports. Going to heads with a 36mm intake port could be an issue.

But as far as the pump, injectors, etc, I'm not sure if it will make a big difference if they are going to be rebuilt to match the new configuration anyhow.

For some reason I was under the impression that the MFI stacks/throttles were all the same size. Now just learning the S has 35mm throttle bodies and my current 69E and later 72T both have 30mm. Frustrating.

Now I need to find 35mm 69S stacks or later E/T 35mm stacks and throttle bodies. Seems everything I need is unobatinium so I'm sure those parts will be easy and cheap....

EDIT: Or bore out the 72T throttle bodies to 36mm and find S stacks. That way I can keep the original E parts original.

The E stacks can be opened as there is enough to open where the T does not
Bruce

2.7 S heads can work. You’ll need to drill and tap them for the MFI injectors, that’s what I did.

Since the only T models equipped with MFI were U.S. 1972 and early 1973 models, I assume you are referring to their plastic stacks. I had no trouble opening mine up to S specification some 20 years ago. There is plenty of material to do so. I believe that T, E, and S plastic stacks are all the same externally.

Ditto. In fact they can be opened up a few mm beyond "S" specs, but the OP's 2.2 shouldn't need more than 36mm.

Get in line. You're looking at about 6 months turn around for pump and throttle body work. Then a shop for dyno work if you want. Four months and my throttle bodies are being dealt with. Six, down from 20, pumps ahead of me last I checked.

Are you talking my existing early 69 E stacks or if I purchase later model plastic E stacks?

Got it! Just answered my question above.

I'm in no rush. I know the wait time. Everything is slow right now.