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M Body handling improvements
#1498923
09/09/13 12:22 PM
09/09/13 12:22 PM
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Joined: Dec 2004
Posts: 1,548
DC, MD Suburbs
440PURSUIT
OP
pro stock
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OP
pro stock
Joined: Dec 2004
Posts: 1,548
DC, MD Suburbs
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Just scored a clean 1980 Diplomat 2 door.
What would be some good improvements to this car?
Cop Parts or aftermarket?
Thanks
Last edited by 440PURSUIT; 09/09/13 01:40 PM.
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Re: M Body handling improvements
[Re: 440PURSUIT]
#1498924
09/09/13 12:23 PM
09/09/13 12:23 PM
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Joined: Nov 2006
Posts: 1,074
Manitoba Canada
67autocross
super stock
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super stock
Joined: Nov 2006
Posts: 1,074
Manitoba Canada
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1980 or 1990? I think the last year for the M was 89
A new iron curtain drawn across the 49th parallel
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Re: M Body handling improvements
[Re: 440PURSUIT]
#1498925
09/09/13 12:23 PM
09/09/13 12:23 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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You mean 80? Cop stuff, if you can find it, is usually cheap. Firm Feel makes some stuff for them, not cheap but quality. I believe Mopar Muscle had a series on upgrading the M some years ago. Finally, www.dippy.org is a good resource.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: M Body handling improvements
[Re: Supercuda]
#1498927
09/09/13 12:30 PM
09/09/13 12:30 PM
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Joined: Nov 2006
Posts: 1,074
Manitoba Canada
67autocross
super stock
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super stock
Joined: Nov 2006
Posts: 1,074
Manitoba Canada
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Next question how much do you want to spend?
A new iron curtain drawn across the 49th parallel
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Re: M Body handling improvements
[Re: 440PURSUIT]
#1498930
09/09/13 02:08 PM
09/09/13 02:08 PM
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Joined: Nov 2006
Posts: 1,074
Manitoba Canada
67autocross
super stock
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super stock
Joined: Nov 2006
Posts: 1,074
Manitoba Canada
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Solid K member mounts and good front shocks would be my first items.
A new iron curtain drawn across the 49th parallel
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Re: M Body handling improvements
[Re: 440PURSUIT]
#1498932
09/17/13 12:43 AM
09/17/13 12:43 AM
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Joined: Jan 2005
Posts: 4,403
Michigan
MarkZ
Worthy
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Worthy
Joined: Jan 2005
Posts: 4,403
Michigan
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How crazy are you looking to get? The weakest part of the entire package are the torsion bars in my opinion. I've got a Fifth Avenue that I pretty much did everything to and still wasn't very happy with it until I put new bars in it.
Cop sway bars, frame ties, and modifying the power steering pump will give you the biggest improvement (providing everything else is straight) for the least amount on money spent. If you really want to make it handle:
-FF 300# torsion bars
-FF aluminum K frame biscuits
-Cop 1 1/8" front sway bar (civy is only 1 1/16") with poly bushings
-Cop 3/4" rear bar with poly bushings
-Frame ties
-5 leaf rear springs
-Dump the ISO setup in the rear and run B-body shock plates
-Bilstein shocks on all four corners
-11/16" tie rods
-Modify the stock power steering pump regulator valve to turn down the pressure
-Decent tires
This is what I did to my Fifth and it handles like it's on rails now.
1987 Fifth Avenue - 512/518/D60
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