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Ecklers AutoMotive
Username Post: 3 link or 4 link suspension        (Topic#353784)
Posts: 12

Age: 55
Loc: Macomb MICHIGAN
Reg: 08-13-18
11-05-18 11:47 PM - Post#2750573    

Hi guys, I have a 62 Impala with a 327 4 speed and a 3.55 rearend. I’m replacing the upper and lower control arms as the old ones are worn and It’s a little loose in the rearend under heavy acceleration. The motor is pushing around 350hp and I was going to order the UMI performance 3 link kit but now I’m debating whether I should spend the extra money and order the 4 link for extra insurance. With these new suspension systems can the three link handle the xtra horsepower or should I bite the bullet and do the four link. Any thoughts would be appreciated.

Ecklers AutoMotive
Silver Supporting Member
Posts: 411
Loc: Columbia, Missouri, USA
Reg: 11-19-02
11-07-18 07:29 AM - Post#2750662    
    In response to Harlyd

I have a pair of 62s, both now have the 4 link setup in an otherwise stock setup. Both are dual quad 409s, quite a bit of torque goes to the rear end. One is a 3.36 posi in a driver car, the other 4.56 BOP rear end in a drag car.

So I have a bit of a bias, I suspect!

Tom Kochtanek

"7th Year" Gold Supporting Member
Posts: 2428
Loc: Sergeant Bluff, Iowa
Reg: 01-10-05
11-07-18 09:07 AM - Post#2750667    
    In response to Harlyd

For a 327 motor you should not need a UMI arms(I am talking about adjustable UMI arms). I have 2 62's with original upper control arms and one with 2 adjustable upper UMI arms. The one with adjustable upper UMI arms is a 409 engine with 475 HP and a Richmond 5 speed

Just use two original upper arms.
Add an additional original upper arm and brackets to the drivers side in addition to existing one on the passenger side.

You will have to remove the rear end housing to weld on the new bracket(the bracket is available new) to the rear end housing (see pictures)

Attachment: P1000443.JPG (922.23 KB) 3 View(s)

Welding on a 2nd upper control arm bracket to the rear end housing

Attachment: P1000444.JPG (935.05 KB) 3 View(s)

Close up of the welding

Attachment: DSCN7673.JPG (174.63 KB) 7 View(s)

Completed installation using a original upper control arm and mounting bracket on the drivers side

57 BelairHT 283/270hp 4 spd
62 ImpHT 327/300 4 spd
62 Imp CV SS 327/300HP 700R4
62 ImpHT SS 409/482 stroker 4 spd
62 Imp SS 409 - 5 spd Convertible under frameoff

Posts: 12

Age: 55
Loc: Macomb MICHIGAN
Reg: 08-13-18
11-12-18 11:01 PM - Post#2751218    
    In response to pvs409

Thanks guys for the input. I already have a new upper adjustable control arm, I bought it when I got the lower control arms. I was told the new upper and lower arms should stiffen up the rear enough that I wouldn’t need the other upper arm. But then I heard a lot of conflicting opinions on the subject so I thought I’d pose the question hear and it’s sounding like four link is the way to go. I definitely don’t like how squirley the suspension gets when I get on it!!

Ecklers AutoMotive
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