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

[Regulatori]

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

[jluetjen]

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.

[Regulatori]

Originally Posted by jluetjen

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.

[Flat6pac]

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

[stownsen914]

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

[Jeff Higgins]

Originally Posted by Flat6pac

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

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.

[Jonny042]

Originally Posted by Jeff Higgins

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.

[nickelplated5s]

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.

[Regulatori]

Originally Posted by Flat6pac

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

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

[Regulatori]

Originally Posted by Jeff Higgins

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.

Got it! Just answered my question above.

[Regulatori]

Originally Posted by nickelplated5s

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.

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