#3975595
General Motors Part Part 3975595 Shifter Support Assembly
Shifter Side
The three thru holes are for tailshaft attachment.
The far right threaded hole is for a 4-Speed
shifter, the hole below it is for a 3-Speed shifter.
This is listed as a Saginaw 3 or 4 Speed shifter
bracket, but will mount to pre 1970 Muncie
tailshafts.

Transmission Side
The three shifter mounting holes have the nuts
attached to this plate.

On Muncie 3846429 Tailhousing
This is the only position this mounting plate will
bolt up to this tailhousing. This mount can't be
bolted to the Muncie casting # 3978764 without
modifications.

Measurement
From bellhousing face to center of shifter mount
on both the 3846429 and 9779246 housings.

Transmission Side
The three shifter mounting holes have the nuts
attached to this plate.
On Muncie 3846429 Tailhousing
This is the only position this mounting plate will
bolt up to this tailhousing. This mount can't be
bolted to the Muncie casting # 3978764 without
modifications.
Measurement
From bellhousing face to center of shifter mount
on both the 3846429 and 9779246 housings.
On Muncie casting #9779246
The 3975595 Shifter mounting plate will bolt up
to this tailhousing.
The 3975595 Shifter mounting plate will bolt up
to this tailhousing.
Applications
3975595
4.010 SUPPORT ASSY., Lever and bracket
1970 Camaro Assembly Manual (UPC 7, Sheet A3)
1970 Camaro Assembly Manual (UPC M11, Sheet A3)
1970 Camaro Assembly Manual (CANCELLED) (UPC M20, Sheet A3)
1971 Camaro Assembly Manual (UPC 7, Sheet 7A-1)
1972 Camaro Assembly Manual (UPC 7A, Sheet 29)
71 Camaro W/3-Spd. (Chevy Parts Books)
70-71 Camaro w/4-Spd. (exc. 454) (Chevy Parts Books)
72-75 Camaro w/Saginaw (Chevy Parts Books)
76-80 F W/M.T. (M20) (Chevy Parts Books)
70-75 Camaro w/3-Spd. (exc. 454) (Chevy Parts Books)
70-71 Camaro w/4-Spd. (exc. 454) (Chevy Parts Books)
72-75 Camaro w/Saginaw (Chevy Parts Books)
77-81 F (M21, M24) (Chevy Parts Books)
76-81 F w/3-Spd. (Chevy Parts Books)
70 F/8 4 Spd. (Pontiac Parts Books)
72-75 ALL F/350-4Spd. (Pontiac Parts Books) (Saginaw?)
76-81 F (M15, M24) (Pontiac Parts Books)
Fits tailshafts with 2" centered holes (3846429, 3857584 , 9779491)
18 1/2" from face
3/16" down
Disclaimer:
Factory correct applications are your responsibility. GM made part and part # changes with no rhyme but a reason (no production interruptions at any cost).
Application charts are for replacement parts that were available at the time of parts book printing, and when possible model specific assembly manuals.
My observations come from the parts I have in my collection or other reliable sources your parts may differ.
If Factory correctness is your goal, do more research, join car clubs,
forums and buy an assembly manual if one is available for your Project Car (you wont be sorry).
This is a fun and interesting part of the hobby!