Magnesium stack casting #s

[Cornpanzer]

Does anyone have a reference that lists the casting #s for the MFI mag stacks from 69-71.
I have two sets of "911" part # S stacks (the 911# designates them as 70-71) yet they have different casting #s.

Any info would be appreciated.
TIA

[Matt Blast]

2.2E #911 110 301 0R
2.2S #911 110 303 1R

I just looked at 4 of the S housings and they are the same.

Matt

[Cornpanzer]

Hmm,
Looks like I may have a mixed up set on my shelf.

The stacks are the 301 0R castings with 36mm" ports at the bottom, yet they were bolted to throttle bodies which measured 38mm at top and 36mm at where they meet the heads...which would be "S", correct?

Thanks for your help

[Cornpanzer]

Found a good soource for the measurements
http://forums.pelicanparts.com/showt...hrottle+bodies

[Matt Blast]

Your throttle bodies are S spec. All the street S throttle bodies '69-'73, had the same 38mm top, and 36mm bottom that met the head. You have 2.2 E stacks on S throtle bodies. It is not uncommon at this point to find mismatched pieces. Usually you find S stacks put onto E throttle bodies though.

Matt