I checked the pn on my springs, and hope they are correct.
convertible 340 4 spd 323 gear. I cant find the codes anywhere to make sure. Is it correct?

Is it really necessary to re-arch them? I was thinking of just wire brushing them and putting them back on, bare steel. I just don't know if springs naturally fatigue.

I plan to run L60 polyglass goodyear in the back, and re-install the day2 air shockes that raise the car in the back (if needed).

The springs are correct for 340/383 cars, along with 778/779 torsion bars

IMHO I would have the springs re arched or put the numbered leaf on a fresh assembly as almost every E-body sags in the rear. New eye bushings are a must too

Mopar Performance used to offer repro springs but the quality was terrible, perhaps other members can report if that has changed

called eaton Detroit springs, and they say the only difference between a 43 vs a 44 is the bushing in not present on the 44.
But show the same spring construction and arch. I guess GM has the same type of part number like changes (if the bushing is with the spring of not). Does a convertible have a different bushing?

So can someone tell me if the 3400044 is the right spring for a 340 convert? I hate to send them my bottom leaf (which has the pn) to attach to a new spring assembly, if its the wrong pn overall.

They said they definitely are a heavy duty spring. I did enough calls to spring shops, and they said re-arching is a short term fix, they will relax back down to the sag the spring once had.

The 44s are the correct springs.

thanks!

""called eaton Detroit springs, and they say the only difference between a 43 vs a 44 is the bushing in not present on the 44.
But show the same spring construction and arch.""

""They said they definitely are a heavy duty spring.""

Did they give you a spring rate for the 43/44 springs? I have been looking and I can not find the spring rate for my 43's.

Thanks


EDIT:
I emailed Eaton and this is their response for the Chrysler 3400043 spring:
""That would be our ML235 spring. It has a rate of 110 lbs.""

Where are the numbers stamped?