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Performance Parts For Sale/Wanted Just Performance, non-stock, trailers, tools and related accessories here. |
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#1
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Muncie 4 speed
Muncie 4 speed. 3925660 casting number. I was told it is a M21, but can not verify it by looking at the transmission. It was modified by previous owner who was going to use it in a road race car. They welded a piece of aluminum plate to the top to prevent the case from flexing. There is a slight twist in the output shaft splines, but I was told it did not cause any issue. $800 OBO.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#2
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TTT
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#3
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If it's for road racing it may have m22 guts installed, that's what m22's were designed for.
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#4
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Maybe. I will pull the side cover this weekend and get pictures.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#5
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If it's a n M22 here's what the gears should look like.
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#6
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Thank you for the pictures. TTT
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#7
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$750 OBO
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#8
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TTT
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#9
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Ttt
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#10
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Did you ever determine which Muncie this is? (M20, 21, 22?)
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Matt 70 GTO 400 4-speed "Turbos make no noise and leave the line like Baby Diarrhea!" - GTOGeorge |
#11
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I'd say it's an M22 (Rock-crusher). No input shaft grooves and straight cut gears.
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#12
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Not yet. We are on vacation now and in the middle of moving. I will pop the inspection cover when I get back. Sorry for the delay.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#13
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It may be. I was told M21. I just know it won’t work for the build I am planning with the Lemans. I will need a stouter transmission and I want overdrive.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#14
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#15
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TTT with more pictures.
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
#16
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Sold. Thank you
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67 Firebird 467 cubic inches 7.71 @ 92 in the 1/8 and 11.69 @ 115 in the 1/4. |
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